Mercedes Benz 1980 series

Mercedes-Benz W201

The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982 to 1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate.
The W201 featured a patented rear 5-link suspension, subsequently used in E and C class models, front and rear anti-roll bars, anti-dive and anti-squat geometry — as well as available airbags, ABS brakes and seatbelt pretensioners.
The W201 enjoyed strong sales in Europe but fared poorly in the United States. Series production ended April 13, 1993 after the manufacture of approximately 1.8 million examples.The 190 and its variants were succeeded in the compact executive car segment by the C-Class, a newly created nameplate.

 

 

Mercedes spent over £600 million researching and developing the 190 and subsequently said it was 'massively over-engineered'.The W201-based 190 was introduced in November 1982.
Local red tape in Bremen (which produced commercial vehicles at the time) prevented Daimler-Benz from building the 190 there, so production was started in Sindelfingen at a capacity of just 140,000 units per year. Eventually after just the first year, Bremen was cleared for production of the 190, replacing its commercial vehicle lines, and there the 190 was built with the first running modifications since release.
The 190E (E for Einspritzung, or Fuel Injection) model uses the Bosch Jetronic Multi-Point Fuel Injection to meter fuel instead of the carburetor of 190 models. Thanks to their fuel injection system, 190E models made more power and were more fuel efficient when compared to non-fuel injected 190 models.
Gasoline models
In 1982, the first available models were the 190 and 190E. Each was fitted with an M102 1,997 cc displacement motor. The 190 was fitted with an M102.921 90 hp (67 kW) engine and the 190E fitted with an M102.962 122 hp (91 kW) engine. In September 1983, the 190E 2.3 (2,299 cc) was released for the North American market only (although a 190E 2.3 appeared in other countries later), fitted with a 113 hp (84 kW) M102.961 engine. This reduction in power was due to the emissions standards in the North American market at the time. The intake manifold, camshaft, and fuel injection system were refined in 1984, and the engine produced 122 hp (91 kW). The carbureted 190 was revised in 1984 as well, increasing its horsepower rating to 105 hp (78 kW). 1984 also saw the arrival of the 2.3-16 "Cosworth."
In 1985, the 190E 2.3 now came fitted with the M102.985 engine, producing 130 hp (97 kW) hp until it was revised in 1987 to use Bosch KE3-Jetronic Injection, a different ignition system, and a higher compression ratio,producing 136 hp (101 kW).
1987 marked the arrival of the first inline-six equipped 190, the 190E 2.6. Fitted with the M103.940 engine, the 190E 2.6 provided 160 hp (119 kW) with a catalyst and 164 hp (122 kW) without. In the North American market, the 190E 2.6 was sold until 1993, the end of the W201 chassis's production. From 1992-1993 the 2.6 was available as a special "Sportline" model, with an upgraded suspension and interior.The 190E 2.3 was sold until 1988, then went on a brief hiatus until it was sold again from 1991 until 1993.

Diesel models

The W201 190D is known for its extreme reliability and ruggedness with many examples doing more than 500,000 miles without any major work. The 190D was available in three different engines. The 2.0 was the baseline, and was never marketed in North America. The 2.2, with the same power as the 2.0, was introduced in September 1983. It was only available in model years 1984 and 1985, and only in the USA and Canada.The 2.5 was available in the late 80's and early 90's. The 2.5 Turbo, while sold in Europe for many years, was available to American buyers only in 1987 and is now somewhat of a collectors item. The exterior of the 2.5 Turbo differentiates from the other models in that it has fender vents in the front passenger side fender for the turbo to breathe.

Limited editions

For the UK and Irish market a special edition 190 was released for the 1993 model year. The car was given the badge name 190LE though on the rear boot lid it read 190E (on the left hand side of the lock) and LE on the right hand side. Roughly 1000 LEs were produced and each one came with a large A3 sized certificate giving each car a unique number.
LEs were available in three colours only; Azzuro Blue (blue/purple), Brilliant Silver and Rosso Red (Burgundy). The Azzuro blue coloured cars came with a grey checked cloth interior, the silver ones with black checked cloth and the Rosso Red with biscuit/cream checked cloth.
LEs were equipped with extra features that had been options on the other models and were only available with the 1.8- or 2.0-litre engine. Both the 1.8- and 2.0-litre models were equipped with a standard electric tilt and slide steel sunroof, four electric windows, electric aerial, 8-hole alloy wheels, Blaupunkt Verona CR43 Radio/cassette and walnut wood trim (as opposed to Zebrano wood). The 2.0-litre-engined version had in addition rear headrests and a front armrest. The LE was nearly £3500 cheaper than a non-LE 1.8 car of identical specification, and £2000 cheaper for a 2.0-litre.
No further options could be added to LE cars from the factory - though some were equipped with other dealer-installed items.
In Australia a limited run of 180E W201 cars could be bought from 1991 to 1993. This was essentially a 190E 1.8 with very basic trim (cloth seats, manual windows etc.), which allowed it to undercut the Luxury Car Tax introduced by the government at the time.
In 1993, for the U.S. market, 2 LE models were offered, limited to 1400 units (700 190E 2.3 LE and 700 190E 2.6 LE). The 2.3 LE was only offered in Emerald Green while the 2.6 was only offered in black.

 

Mercedes 180 Limited Edition

190E 2.3-16 & 2.5-16 "Cosworth"

In the late 1970s, Mercedes competed in rallying with the big V8-powered Coupés of the R107 Series, mainly the light-weight Mercedes 450 SLC 5.0. Mercedes wished to take the 190 E rallying, and asked British race car engineering company Cosworth to develop an engine with 320 bhp (239 kW) for the rally car. This project was known as project "WAA' by Cosworth".During this time, the Audi Quattro with its all-wheel drive and turbocharger was launched, making the 2.3-16v appear outclassed. With a continued desire to compete in high-profile motor sport with the 190, and also now an engine to do it with, Mercedes turned to the Deutsche Tourenwagen Meisterschaft (DTM) (German Touring Car Championship) motor sport series instead. Cars racing in this championship, however, had to be based on a roadgoing model. Mercedes therefore had to put into series production a 190 fitted with a detuned version of the Cosworth engine. This high-performance model was known as the 190 E 2.3-16, and debuted at the Frankfurt Auto Show in September 1983, after its reputation had already been established. Three cars, only slightly cosmetically altered, had set three world records in August at the Nardo testing facility in Italy , recording a combined average speed of 154.06 mph (247.94 km/h) over the 50,000 km endurance test, and establishing twelve international endurance records. The Mercedes 190-E Cosworth was also featured on the second episode in series fifteen of the popular car show Top Gear.

2.5 model

An enlarged 2.5 L engine replaced the 2.3 L in 1988. It offered double-row timing chains to fix the easily snapping single chains on early 2.3 engines, and increased peak output by 17 hp (12.5 kW) with a slight increase in torque. For the European market without catalyst (RÜF) the car delivered 204 bhp (150 kW). Catalyst equipped 2.5-16s produced a slightly reduced 197 bhp (147 kW). It is debated whether the 2.5 L engine was developed and built by Mercedes or Cosworth.Mercedes was not keen to broadcast the fact that their most sporting saloon car has an engine developed by a British company. However some cylinder heads from 2.5 L cars are stamped with the Coscast logo indicating they were cast at Cosworth's foundry just like the 2.3s. Cosworth also list the project code "WAB" for the development of the 2.5-16-valve head just as they do for the 2.3-16-valve head. Car program Top Gear predicted this 2.5 model to be one of the future classics in the car world, because of its relatively unknown history and rivalry with the BMW M3.

16v differences

Due to their performance, the 16-valve cars were different from the other 190 models. The body kit on the 2.3-16 and 2.5-16 reduced the drag coefficient to 0.32, one of the lowest CD values on a four-door saloon of the time, whilst also reducing lift at speed. The steering ratio was quicker and the steering wheel smaller than that on other 190s, whilst the fuel tank was enlarged from 55 to 70 L. The Getrag 5-speed manual gearbox was unique to the 16-valve and featured a 'racing' gear pattern with 'dog-leg' first gear, left and down from neutral. This meant that the remaining 2nd, 3rd, 4th and 5th gears were in a simple H pattern allowing fast and easy selection. The gearchange quality was, however, noted as "notchy, baulky", criticisms which weren't levelled at the BMW M3 (E30) which shared the same gearbox. The pattern is also unusual in that the driver engages reverse by shifting left and up from neutral, as for first gear in a conventional pattern. This was demonstrated in a Top Gear episode (S15E02) where James May took a 190E 2.3-16 Cosworth and repeatedly confused reverse and first gear. An oil cooler was fitted to ensure sufficient oil cooling for the inevitable track use many of these cars were destined for.
The strictly four-seater interior had Recaro sports seats with strong side bolsters for front and rear passengers. 3 extra dials - an oil temperature gauge, stopwatch and voltmeter - were included in the centre console. The 190 E 2.3-16 was available in only two colours, Blue-Black metallic (Pearl Black in the US), and Smoke Silver. The 2.5-16 added Almandine Red and Astral Silver.
All 2.3-16-valve 190 models are fitted with a Limited Slip Differential (LSD) as standard. They were also available with Mercedes' ASD system which was standard equipment on the 2.5-16v. The ASD is an electronically controlled, hydraulically locking differential which activates automatically when required. The electronic control allows varied amounts of differential lock from the standard 15% right up to 100%. It is not a traction control system however, and can only maximize traction rather than prevent wheel spin. Activation of the ASD system is indicated by an illuminating amber triangle in the speedometer.
The suspension on 16-valve models is very different from the standard 190 (W201). As well as being lower and stiffer, it has quicker dampers, larger anti-roll bars, harder bushings and hydraulic Self-levelling suspension (SLS) on the rear. This allows the rear ride height to remain constant even when the car is fully loaded.
At the inauguration of the new, shorter Nürburgring in 1984, a race with identical cars was held, with former and current F1 pilots at the wheel. A rather unknown young driver named Ayrton Senna took First Place in that race.
Private Teams such as AMG later entered the 2.3-16 in touring cars races, especially the DTM. In the late 1980s, the 2.5-16 (never released in the United States) raced many times, against the similar BMW M3 and even the turbocharged Ford Sierra RS Cosworth.

Evolution models
With the debut of the BMW M3 Sport Evolution, Mercedes' direct competitor, it became obvious that the 2.5-16 needed a boost for the circuit. In March 1989, the 190 E 2.5-16 Evolution debuted at the Geneva Auto Show. The Evo I, as it came to be called, had a new spoiler and wider wheel arches. Many changes were made to under-the-skin components such as brakes and suspension. There was a full SLS suspension allowing vehicle ride height to be adjusted from an interior switch. All were intended to allow the Evolution cars to be even more effective round a track.
The Evo I's output is similar to the 202 bhp (151 kW) of the "regular" 2.5-16. However this car had a redesigned engine of similar capacity but, most importantly, a shorter stroke and bigger bore which would allow for a higher rev limit and improved top-end power capabilities. Additional changes stretch to "rotating masses lightened, lubrication improved and cam timing altered".Cosworth also list a project code "WAC" for the development of the short-stroke Evolution engine.
Only 502 units of the Evolution model were produced for homologation in compliance with DTM rules. For those customers desiring even more performance, a PowerPack option engineered by AMG was available for DM 18,000. The PowerPack option included hotter camshafts, a larger diameter throttle body, more aggressive ignition and fuel management as well as optimization of the intake and exhaust systems. The net result was an additional 30 bhp (22 kW).
In March 1990, at the Geneva Auto Show, the 190 E 2.5-16 Evolution II was shown. With the success of the first Evolution model, this model's 502-unit production was already sold before it was unveiled.This car retailed in 1990 for USD $80,000.
The "Evo II" included the AMG PowerPack fitted to the same short-stroke 2.5 engine as the Evolution, as well as a full SLS suspension allowing vehicle ride height to be adjusted from an interior switch. An obvious modification to the Evolution II is a radical body kit (designed by Prof. Richard Eppler from the University of Stuttgart) with a large adjustable rear wing, rear window spoiler, and Evolution II 17-inch wheels. The kit served an aerodynamic purpose — it was wind tunnel tested to reduce drag to 0.29, while at the same time increasing downforce. Period anecdotes tell of a BMW executive who was quoted as saying "if that rear wing works, we'll have to redesign our wind tunnel." The anecdote claims that BMW did.
As mentioned 500 were made in "blauschwarz" blue/black metallic. But the last two, numbers 501 and 502 were made in astral silver.
It is clear that these cars are now extremely rare in the collectors cars market place. Very few, if any have returned for resale in Europe as these cars are now clearly in the hands of long term collectors or are in personal storage. Of interesting fact is that a significant number of Evolution II cars were privately imported to Japan and that these cars appear to be the only units available for trade as of lately. Latest appearance in USS Tokyo auction group resulted in a wholesale price at 4,050,000 yen for a 65,000 km pristine example and this car was the third of its kind to appear in the 2010 to 2011.

16V AMG power pack

Available only to 2.5-16 and Evolution I models, optional AMG Power Pack increased power to 224 bhp (166 kW) at 7,200 rpm and torque o 181 lb·ft (245 N·m) at 5,000 rpm, whilst pushing the top speed up to 155 mph. In their final incarnations, these engines produced up to 350 bhp (260 kW) in racing tune.

 

Mercedes-Benz R107 and C107

Mercedes-Benz R107 and C107

The Mercedes-Benz R107 and C107 automobiles were produced from 1971 through 1989 and were described by many as one of the best looking cars Mercedes-Benz produced to date,^[2] being the second longest single series ever produced by the Mercedes-benz automaker, after the G-Class. They were sold under the SL (R107) and SLC (C107) model names. The R107 replaced the W113 SL-Class in 1972 and was replaced by the R129  SL-Class in 1989. The SLC replaced the W111 Coupé in 1971 and was replaced by the C126  S-class coupe in 1981.

 

 

 

Model history

The R107 took the chassis components of the mid size Mercedes-Benz W114 model and mated them to the larger engines from the S-Class (W116).
The SL variant was a 2-seat convertible/roadster with standard soft top and hardtop and optional folding seats for the rear bench. The SLC (C107) derivative was a 2 door hardtop coupe with normal rear seats. The SLC is commonly referred to as an 'SL coupe', but in reality it was an S-class coupe, replacing the former saloon-based 280/300 SE coupé in Mercedes lineup. The SLC was replaced earlier than the SL, in 1981, with a much larger model, the 380 SEC based on the new S class.
Volume production of the first R107 car, the 350 SL, started in April, 1971 alongside the last of the W113 cars; the 350 SLC followed in October. Sales in North America began in 1972, and cars wore the name 350 SL, but had a larger 4.5L V8 (and were renamed 450 SL/SLC for model year 1973); the big V8 became available on other markets with the official introduction of the 450 SL/SLC on non-North American markets in March, 1973. US cars sold from 1972 through 1975 used the Bosch D Jetronic fuel injection system, an early electronic engine management system.
From July, 1974 both SL and SLC could also be ordered with a fuel-injected 2.8L straight-6 as 280 SL and SLC. US models sold from 1976 through 1979 used the Bosch K Jetronic system, an entirely mechanical fuel injection system. All US models used the 4.5 liter engine, and were called 450 SL/SLC.
In September, 1977 the 450 SLC 5.0 joined the line. This was a special version of the big coupé featuring a new all-aluminum five-liter V8, aluminum alloy doors, hood and trunk lid - and a black rubber rear spoiler.

In September, 1977 the 450 SLC 5.0 joined the line. This was a special version of the big coupé featuring a new all-aluminum five-liter V8, aluminum alloy doors, hood and trunk lid - and a black rubber rear spoiler.

 

Mercedes-Benz 450 SLC 5.0 - note longer wheelbase and different rear pillar

Starting in 1980, US cars were equipped with lambda control, which varied the air/fuel mixture based on feedback from an oxygen sensor. The 350, 450 and 450 SLC 5.0 models (like the 350 and 450 SL) were discontinued in 1980 with the introduction of the 380 and 500 SLC in March, 1980. At the same time, the cars received a very mild makeover; the 3-speed automatic was replaced by a four-speed unit, the 280 models came with a standard 5-speed (formerly a 4-speed) manual and all five-liter cars gained a black rear spoiler lip. The 280, 380 and 500 SLC were discontinued in 1981 with the introduction of the 126 series 380 and 500 SEC coupes. A total of 62,888 SLCs had been manufactured over a ten-year period of which just 1,636 were the 450 SLC-5.0 and 1,133 were the 500 SLC. Both these models are sought by collectors today. With the exception of the SL65 AMG Black Series, the SLC remains the only fixed roof Mercedes-Benz coupe based on a roadster rather than a sedan.
Following the discontinuation of the SLC in September, 1981, the 107 series continued initially as the 280, 380 and 500 SL. At this time, the V8 engines were re-tuned for greater efficiency, lost a few hp and consumed less fuel, helped by substantially numerically shorter axle ratios (that went from 3.27:1 to 2.47:1 for the 380 SL and from 2.72:1 to 2.27:1 for the 500 SL). From September, 1985 the 280 SL was replaced by a new 300 SL, and the 380 SL by a 420 SL; the 500 SL continued and a 560 SL was introduced for certain extra-European markets, most notably the USA. Also in 1985, the Bosch KE Jetronic was fitted. The KE Jetronic system varied from the earlier, all mechanical system by the introduction of a more modern engine management "computer", which controlled idle speed, fuel rate, and air/fuel mixture. The final car of the 18 years running 107 series - 500 SL painted Astral Silver was built on August 4, 1989 and it currently resides in the Mercedes-Benz museum in Stuttgart, Germany.
North American models

Sales of the SL and SLC models begun in the US one year later than in Europe.
The R107/C107 since introduction on North American market sported quad headlights, and from 1974 front and rear bumpers had added 8 inches (203 mm) of rubber on each end to comply with the U.S. National Highway Traffic Safety Administration regulations.
When the first 350s were exported to the US, because of the strict horsepower robbing emission requirements, the US 350s were shipped with low compression 4.5 liter engines.
The 450 SL was produced until 1980. Model years 75 and 76 450 SLs suffered from vapor lock and hard restart because of the under-hood position of the catalytic converter. Starting in MY 77, the catalytic converter was moved to replace the resonator, located just behind the transmission in the exhaust system.
Next was the 380 SL imported from 1981 to 1985. The 380 SL was the least powerful of the US imported R107 roadsters. This engine came with a single row timing chain from 1981 through 1983. MYs 1984 and 1985 came with a double row timing chain from the factory. These early 380 models were plagued with chain failure problems and the problem was corrected by Mercedes-Benz, free of charge. Some models, however, escaped retrofit and may at some point fail as a result.
Another problem area for late 450 SLs and early 380 SLs was the automatic climate control system. Based on a "servo", which controlled coolant flow to the heater core, as well as vacuum to actuate the vents in the interior of the car, the system proved unreliable. It was installed on 450 SLs from 1978 through end of production in 1980, and continued on the 1981 MY of the 380 SL. Models produced prior to 1978 had a manual climate control system, models produced after 1981 received a more reliable automatic climate control system.
The more powerful 500 SL with 5.0 liter engine, produced from 1980–1989, was not available in the US through Mercedes-Benz and was popular in "gray market" import before the arrival of the 560 SL (only made for the USA, Japanese and Australian market) in 1986-1989.
Despite the larger 5.6 liter engine of the 560 SL, the 500 SL is recorded as being the fastest production 107 produced (mostly because of the lack of emission restraints) The 500 SL was published by Mercedes-Benz as having 0-60 mph times of 7.4 seconds for a top speed of 225 km/h (140 mph). Torque for the 500 SL is 296 lb·ft (401 N·m) at 3200 rpm and for the 560 SL 287 lb·ft (389 N·m) at 3500 rpm.

 

Mercedes-Benz W113

Mercedes-Benz W113

The Mercedes-Benz W 113 is a two-seat roadster/coupé, introduced at the 1963 Geneva Moto Show, and produced from 1963 through 1971. It replaced both the legendary 300 SL (W 198) and the 190 SL (W 121 BII). Of the 48,912 W 113 SLs produced, 19,440 were sold in the US.
The W 113 SL was developed under the auspices of Mercedes-Benz Technical Director Fritz Nallinger, Chief Engineer Rudolf Uhlenhaut and Head of Styling Friedrich Geiger. The lead designers were Paul Bracq and Béla Barényi, who devised its distinctive, patented, slightly concave hardtop, which inspired the "Pagoda" nickname.
All models were equipped with an inline-six cylinder engine with multi-port fuel injection. The bonnet, trunk lid, door skins and tonneau cover were made of aluminum to reduce weight. The comparatively short and wide chassis, combined with an excellent suspension, powerful brakes and radial tires gave the W 113 superb handling for its time. The styling of the front, with its characteristic upright "fishbowl" headlights and simple chrome grille, dominated by the large three-pointed star in the nose panel, paid homage to the then already legendary 300 SL roadster.
W 113 SLs were typically configured as a "Coupe/Roadster" with a soft-top and an optional removable hardtop. A 2+2 was introduced with the 250 SL "California Coupe," which had a fold-down rear bench seat instead of the soft-top.

History

By 1955, Mercedes-Benz Technical Director Prof. Fritz Nallinger and his team held no illusions regarding the 190 SL's lack of performance, while the high price tag of the legendary 300 SL supercar kept it elusive for all but the most affluent buyers. Thus Mercedes-Benz started evolving the 190 SL on a new platform, model code W 127, with a fuel-injected 2.2 liter M180 inline-six engine, internally denoted as 220 SL. Encouraged by positive test results, Nallinger proposed that the 220 SL be placed in the Mercedes-Benz program, with production commencing in July 1957.
However, while technical difficulties kept postponing the production start of the W 127, the emerging new S-Class W 112 platform introduced novel body manufacturing technology altogether. So in 1960, Nallinger eventually proposed to develop a completely new 220 SL design, based on the "fintail" W 111 sedan platform with its chassis shortened by 30 cm (11.8 in), and technology from the W 112. This led to the W 113 platform, with an improved fuel-injected 2.3 liter M127 inline-six engine and the distinctive "pagoda" hardtop roof, designated as 230 SL.
The 230 SL made its remarkable debut at the prestigious Geneva Motor Show in March 1963, where Nallinger introduced it as follows: "It was our aim to create a very safe and fast sports car with high performance, which despite its sports characteristics, provides a very high degree of traveling comfort

Legacy

The W 113 was the first sports car with a "safety body," based on Bela Barényi's extensive work on vehicle safety: It had a rigid passenger cell and designated crumple zones with impact-absorbing front and rear sections built into the vehicle structure. The interior was "rounded," with all hard corners and edges removed, as in the W 111 sedan.
The W 113 was also the first Mercedes-Benz with radial tires.

Models

230 SL (1963–1967)

230 SL (1963–1967) [edit]

Mercedes-Benz 230 SL, US model

Production of the 230 SL commenced in June 1963 and ended on 5 January 1967. Its chassis was based on the W 111 sedan platform, with a reduced wheelbase by 30 cm (11.8 in), recirculating ball steering (with optional power steering), double wishbone front suspension  and an independent single-joint, low-pivot swing rear-axle with transverse compensator spring. The dual-circuit brake system had front disc brakes and power-assisted rear drum brakes. The 230 SL was offered with a 4-speed manual transmission, or an optional, very responsive fluid coupled (no torque converter) 4-speed automatic transmission, which was popular for US models. From May 1966, the ZF S5-20 5-speed manual transmission was available as an additional option, which was particularly popular in Italy. Of the 19,831 230 SLs produced, less than a quarter were sold in the US.
The 2,308 cc (2.3 L) M127.II inline-six engine with 150 PS (110 kW; 150 hp) and 196 N·m (145 lb·ft) torque was based on Mercedes-Benz' venerable M180 inline-six with four main bearings and mechanical Bosch multi-port fuel injection. Mercedes-Benz made a number of modifications to boost its power, including increasing displacement from 2,197 cc (2.2 L), and using a completely new cylinder head with a higher compression ratio (9.3 vs. 8.7), enlarged valves and a modified camshaft. A fuel injection pump with six plungers instead of two was fitted, which allowed placing the nozzles in the cylinder head and "shooting" the fuel through the intake manifold and open valves directly into the combustion chambers. An optional oil-water heat exchanger was also available.
Mercedes-Benz Chief Engineer Rudolf Uhlenhaut, who was as competent behind the wheel as any racing driver, demonstrated the capabilities of the 230 SL on the tight three-quarter mile Annemasse Vétraz-Monthoux race track in 1963, where he put up a best lap time of 47.5 seconds vs. 47.3 seconds by Grand Prix driver Mike Parkes on his 3 liter V12 Ferrari 250 GT.
A brief chronology of the most notable changes made to the 230 SL:

• 10/1963: First 230 SL with automatic transmission.
• 09/1964: Spare tire well removed, tire mounted horizontally.
• 11/1964: Optional tinted/thermal glass and new soft-top with steel bows (distinguished by missing chrome trim on the outer trailing edge).
• 04/1964: US models with radio Becker Europa TR instead of Europa TG.
• 08/1965: Some harmonization with new W 108/W 109 sedans, incl. new floor panels, combined brake and clutch fluid reservoir, trunk light and interior changes. US models with hazard lights.
• 03/1966: Mounts for three-point seat belts added.
• 05/1966: Optional ZF 5-speed manual transmission; rare and now very desirable

250 SL (1966–1968)

The 250 SL was introduced at the 1967 Geneva Motor Show.Production had already commenced in December 1966 and ended in January 1968. The short one-year production run makes the 250 SL the rarest of the W 113 series cars. The 250 SL retained the stiffer suspension and sportier feel of the early SLs, but provided improved agility with a new engine and rear disc brakes. Range also improved with increased fuel tank capacity from 65 L (17.2 US gal) to 82 L (21.7 US gal). Like its predecessor, the 250 SL was offered with a 4-speed automatic transmission, and 4-speed or ZF 5-speed manual transmissions.For the first time, an optional limited slip differential was also available. Of the 5,196 250 SLs produced, more than a third were sold in the US.

The main change was the use of the 2,496 cc (2.5 L) M129.II engine with 6 mm (0.2 in) increased stroke, 2 mm (0.1 in) increased valve ports, and seven main bearings instead of four. The nominal maximum power remained unchanged at 150 PS (110 kW; 150 hp), but torque improved from 145 lb·ft (197 N·m) to 159 lb·ft (216 N·m). Resiliency also improved with a new cooling water tank ("round top") with increased capacity from 10.8 L (2.9 US gal) to 12.9 L (3.4 US gal), and a standard oil-water heat exchanger.
The wider power band of the 250 SL resulted in noticeably improved performance, as the 230 SL engines rarely produced more than 143 PS (105 kW; 141 hp) in practice.

California Coupé
The 250 SL also marked the introduction of a 2+2 body style, the so-called "California Coupé", which had only the removable hardtop and no soft-top: a small fold-down rear bench seat replaced the soft-top well between passenger compartment and trunk. The lacking soft-top relegated open California Coupés to a formidable nice weather ride, so many of them are very well preserved today. Retrofitting the soft-top above the rear bench seat requires considerable effort and expense, however. Thus while these 2+2 models are rare, their somewhat limited usability makes them not particularly sought after today.

Midlife improvements

In August 1967, a number of additional changes were incorporated to accommodate stricter safety regulations and US emission laws. The safety improvements included a collapsible steering wheel and padded wheel hub, concave control knobs, elastic black rubber heater levers (instead of rigid colored translucent plastic), and softer, rounded dash top padding. Door handles, locks, and window cranks were modernized and less protruding, the door pockets were elastic, the rear-view mirror frame was chrome instead of black plastic, and the side view mirrors became more angular. Essentially, the 1967 250 SL retained the more classic "chrome" interior of the 230 SL, whereas the 1968 250 SL introduced the modernized "safety" interior of the 280 SL.
US models acquired side reflectors on the fenders, Kangol three-point seat belts, an illuminated gearbox for the automatic, and emission control equipment. The chrome horn ring was changed to matte finish.

280 SL (1967–1971)

The 280 SL was introduced in December 1967 and continued in production through 23 February 1971, when the W 113 was replaced by its successor, the entirely new and substantially heavier R107 350 SL. Over the years, the W 113 evolved from a sports car  into a comfortable grand tourer, and US models were by then usually equipped with the 4-speed automatic transmission and air conditioning. Manual transmission models came with the standard 4-speed or the optional ZF 5-speed, which was ordered only 882 times and thus is a highly sought-after original option today. In Europe, manual transmissions without air conditioning were still the predominant choice. Of the 23,885 280 SLs produced, more than half were sold in the US.
The main change was an upgrade to the 2,778 cc (2.8 L) M130 engine with 170 PS (130 kW; 170 hp) maximum power and 180 lb·ft (244 N·m) maximum torque, which finally gave the W 113 adequate power. The performance improvement was achieved by increasing bore by 4.5 mm (0.2 in), which stretched the limits of the M180 block, and required pairwise cylinder casts without cooling water passages. This mandated an oil-cooler, which was fitted vertically next to the radiator. Each engine was now bench-tested for two hours prior to being fitted, so their power specification was guaranteed at last.
The M130 marked the final evolution of Mercedes-Benz' venerable SOHC M180 inline-six, before it was superseded by the entirely new DOHC  M110 inline-six introduced with R107 1974 European 280 SL models. For some time, it was also used in the W 109 300 S-Class, where it retired the expensive 3 liter M189 alloy inline-six.
A brief chronology of the most notable changes made to the 280SL:

• 12/1967: One piece wheel-covers (like W 108/W 109 sedans).
• 10/1968: US models with sealed beam headlights without fog lights.
• 02/1969: New tail lights with amber turn signals.
• 05/1969: ZF 5-speed manual transmission discontinued as listed option and available only on special request.
• 07/1969: US models with headlight assembly with full amber lower section, illuminated side markers, transistorized ignition, and improved emission control.
• 08/1969: Heated rear window for hardtop, hazard lights for all models, single master key for all locks.
• 04/1970: Bosch Lichteinheit headlights optionally with halogen main beam (distinguished by "flat" instead of "bubble" lens).
• 08/1970: Fuchs alloy wheels available as a factory-fitted option.
• 11/1970: Opaque beige plastic coolant expansion tank (instead of satin-black steel). New door locks: cylinder can be depressed while door is locked.

North American models

North American models have a number of subtle differences, the most obvious one being the distinctive "sealed beam" bulb headlights required in the US versus the Bosch Lichteinheit headlights for the rest of the world.1970 US models also acquired amber turn-signal lenses on the rear lights, later than most other countries.
Other differences of the North American models include imperial gauges, chrome bumper guards, side reflectors (illuminated from 1970), lower rear-axle ratios for faster acceleration yet lower top speeds, and no "single-side" parking lights. US market 280 SL engines required emission control modifications, including "softer" valve timings, a reduced compression ratio and a modified injection pump, which reduced power from 170 PS (130 kW; 170 hp) to 160 PS (120 kW; 160 hp).^[7] In the US, automatic transmission, air conditioning, and white wall tires were much more popular than elsewhere.
European cars were popular as US gray-market imports: those vehicles were brought to the US some years after their original delivery in Europe. Early European imports had aftermarket hazard lights and Kangol seat belts fitted, US safety requirements that were adopted in Europe only in later production years.