Saloon
Series production of the 4-door saloon began in August 1959, which made its debut at the Frankfurt Auto Show in the autumn. Initially the series consisted of the 220 b, 220 Sb, and 220 SEb. These replaced the (W105) 219, the (W180) 220 S and the (W128) 220 SE Ponton saloons respectively. The 220b was an entry-level version with little chrome trim, simple hubcaps, and basic interior trim that lacked pockets in the doors. Prices were DM16,750, 18,500 and 20,500, with a rough sales ratio of 1:2:1.
All initial models shared the 2195 cc M127 straight-six engine carried over from the previous generation, producing 95 hp at 4800 rpm in the single carburetor 220b and capable of accelerating the heavy car to 160 km/h (155 if fitted with optional automatic gearbox). The 220 Sb featured twin carburetors and produced 110 hp at 5000 rpm, raising top speed to 165 km/h (160 km/h) and improving 0–100 km/h (62 mph) acceleration to 15 seconds (16 on the 220b). The top of the range 220 SEb featured Bosch fuel injection producing 120 hp at 4800 rpm, with a top speed of 172 km/h (168 km/h for auto) and a 0–100 km/h (62 mph) time of 14 seconds.
In 1961, the W111 saloon chassis was shared both up and down in the Mercedes automobile line: downward with the more basic, shorter-bonneted, 4-cylinder W110 range, and upward with the company's top 4-door luxury saloon, the W112. It was built with the W111 body but fitted with the W189 300 “Adenauer’s”' larger block, fuel-injected 3-litre M189 6-cylinder engine. Dubbed the 300 SE, it was given many standard power features and a high level of interior and exterior trim.
In May 1965, the 220 Sb and 220 SEb were replaced in the W111 lineup by the new 230 S. Beyond badging changes it was visually identical to the 220 Sb, with a more powerful modernised 2306 cc twin carburetor M180 engine producing 120 hp at 5400 rpm. Top speed was 176 km/h (174 km/h, and acceleration from 0-100 km/h (62 mph) 13 seconds (15 with automatic transmission).
Throwing off convention, a downscaled successor to the 6-cylinder 220b was introduced into the previously 4-cylinder W110 line: the 2.3 L model 230 was a powered by a detuned single carburetor version of the M127 engine.
A total of 41,107 230 S models were built through January 1968, when the last of 4-door fintails left the production line.
A total of 337,803 W111 saloons were built between 1959 and 1968.
Coupé and cabriolet
Design of a replacement for the graceful two-door W128 220 SE coupe and cabriolet began in 1957. Since most of the chassis and drivetrain were to be unified with the W111 saloon, the focus was on interior and exterior styling. Mercedes chose the work of designer Paul Bracq, which featured a more square, subtle rear-end treatment evocative of the clean modern styling of his mid-1960s W108/W109 to come than the pointed-fin Heckflosse adopted throughout the rest of the Mercedes model line.[3] The result was the 220 SE, distinct from the rest of the W111 line (but ultimately sharing its bodywork with the 3.0 L M189 powered W112 300 SE coupe introduced a year later). Interiors were unique, and lavish compared to the W111 sedans.
Production began in late 1960, with the coupé making its debut at the 75th anniversary of the opening of Mercedes-Benz Museum in Stuttgart in February of the next year.
The convertible followed at the Frankfurt Auto Show a few months later. Almost identical to the coupé, its soft-top roof folded into a recess behind the rear seat and was covered by a tightly fitting leather "boot" in the same color as the seats.
Unlike the previous generation of two-door ponton series, the 220 SE designation was used for both the coupé and convertible; both received the same version of the 2.2 L M127 engine. Prices in 1962 were 32,500 for the coupé and 36,000
250 SE
The 220 SE was superseded in early autumn 1965 by the 250 SE, which featured the new mechanically fuel-injected 2.5 L M129 engine. Producing 150 hp at 5500 rpm, it gave the vehicle a significant improvement in top speed, 193 km/h (188 km/h with automatic transmission), and 0–100 km/h (62 mph) acceleration time of 12 seconds (14 with automatic transmission). Visible changes include new 14-inch wheels, which came with new hub cabs and beauty rings accommodating the larger disc brakes and new rear axle from the W108 family.
280 SE
In November 1967, the 250 SE was superseded by the 280 SE. It was powered by the new electrically fuel-injected 2.8 L M130 engine, which produced 160 hp at 5500 rpm. Top speed was hardly affected, but acceleration from 0-100 km/h (62 mph) improved to 10.5 seconds (13 with automatic transmission). Inside, the car received a wood veneer option on the dashboard and other minor changes, including door lock buttons and different heater levers. The hubcaps were changed yet again to a new one piece wheelcover, and the exterior mirror was changed.
Despite its smaller engine, 280 SE could outperform the larger, heavier M189-powered 300 SE, resulting in the engine’s retirement in the more expensive model.
280 SE 3.5
A final model was added in August 1969, the 280 SE 3.5, the first Mercedes post-War coupé with more than 3 litres. The car was fitted with the brand-new 3.5 L M116 V8. It produced 200 hp at 5800 rpm, and a top speed of 210 km/h (205 km/h with automatic transmission) and a 0-100 km/h (62 mph) at 9.5 seconds (11.5 for the automatic transmission). As one of several changes to modernize the aging design a lower, wider grille was incorporated and the facelifted model is often by the Germans referred to as the The new grille was not a side-effect of enlarging the engine compartment to accommodate the V8 despite popular belief. Front and rear bumpers were also modified with the addition of rubber rub strips; the rear lenses changed to a flatter cleaner design. This change was carried across to the standard 280 SE. As the top of its range, the 280 SE 3.5 is seen in some ways as an ideological successor to the W112 300 SE coupe, though it lacked the W112's interior appointments, and air suspension.
There were plans to place the larger 4.5 L M117 V8 engine in the W111 (to create a 280 SE 4.5).
The last 280 SE was produced in January 1971, with the 280 SE 3.5 ending in July.
Production numbers
The total production over the decade was: 220 SEb - 16,902, 250 SE - 6,213, 280 SE - 5,187, and 280 SE 3.5 - 4,502 units. The grand total of 2-door W111 models was 32,804 of which 7,456 were convertibles.
Successor
The indirect replacement for the coupé was the C107 SLC, which was a hardtop coupé version of the SL roadster, with no link with the S Class range. The true successor of the W111/12 coupé was the C126 (SEC) coupé of 1981. As the R107 SL grew bigger and more luxury oriented, it assumed the position of the top of the range convertible, which meant the true four-seater convertible would disappear from Mercedes-Benz's lineup for nearly two-decades, until the A124 in 1992.
