design these generally cost less than the W113-based 280 SL model that ran until 1971, and its successor, the 3.5 or 4.5 litre V8 Mercedes SL R107/C107 (1971–1989) roadster and coupé. While a 'hard-top' unlike the fully convertible SL, the pillarless design allowed all the windows to be lowered completely for open air motoring. Only 67,048 coupés were manufactured from 1969 to 1976 (vs. 1,852,008 saloons). Of these 24,669 were 280C and 280CE (top of the range), and 42,379 were the lesser 250C and 250CE (A Mercedes-Benz 220D pickup on the W115 chassis was produced briefly in Argentina in the 1970s.) The W114 received a facelift in 1973 – with a lower bonnet-line, lower and broader grill, a single front bumper to replace the double bumpers, lower placement of the headlamps, A-pillar treatment for keeping the side windows clear, removal of the quarter-windows in the front doors, ribbed tail lights to minimize occlusion of the tail lights with road dirt, and larger side mirrors. The interior received inertia reel belts and a new padded steering wheel with a four-hole design. The Mercedes-Benz W115 is known to be a very durable car. In 2004 Greek taxi driver Gregorios Sachinidis donated his 1976 Mercedes-Benz 240D to the Mercedes-Benz Museum Collection with on the odometer, which is recognised as the Mercedes-Benz with the highest recorded mileage known to date. Innovations Like its larger variant, this car also boasted advanced technological innovations. 1969 saw the introduction of the Bosch D-jetronic fully electronic fuel injection system into the 250CE. This was the first ever production Mercedes-Benz to use this system. Other innovations in the W114/W115 models include a center console (a first in a Mercedes saloon), ribbed taillights in 1974. All coupé models used the 6-cylinder engine (and thus were W114s) and were designated with a "C" in the model name. North America In 1968, Diesel-engined options were added to the W114/W115 line, introduced in North America as the 220D, 240D and 300D. These models from the start had unique headlights, utilizing a sealed-beam lamp instead of the H4 type used in the European models. Bumpers changed frequently and there were at least three different bumpers used over the production run for the North American market. The 1974 model year brought significantly larger bumpers due to new DOT requirements. North American 220Ds and 240Ds were offered with a 4-speed manual or 4-speed automatic, whereas all