The Mercedes-Benz W114 and W115 were the internal designation Mercedes-Benz used for a generation of front-engine, rear-drive, five-passenger sedans and coupés introduced in 1968, with three-box styling by Paul Bracq — succeeding the W110 models introduced in 1961; and manufactured until model year 1976, when the W123 was released. W114/W115s were distinguished in the marketplace by nameplates relating to their engine size. W114 models featured six-cylinder engines and were marketed as the 230, 250, and 280. W115 models featured four-cylinder engines and were marketed as the 200, 220, 230, and 240, with diesel models carrying a D designation, as distinct from gasoline/petrol models. When Mercedes introduced the W114/115 in 1968, they marketed sedans in two size classes (W114/W115 and S-Class) and marketed the W114/115 range as New Generation Models, ultimately the only model of the new generation. Mercedes used a '/8' on the W114/115 ID plates, indicating their 1968 launch year, giving rise to their '/8' or 'slash eight' nicknames — and the German nickname Strich Acht, loosely translated into English as stroke eight. History The W114/W115 models were the first post-war Mercedes-Benz production car to use a newly engineered suspension, not derived from preceding models. The new format of semi-trailing rear arms and ball-joint front end first displayed in the W114/W115 would be used in all new Mercedes passenger car models until the development of the multi-link rear suspensions of the 1980s. The W108/109 S-Class of the 280S/8, 280SE/8 and 300SEL/8 (and W113 230SL, 250SL and 280SL "Pagoda") would be the last of the low-pivot swing axle and king pin/double wishbone front ends. The next S-Class, the W116, had the same engineering as the W114/115. The Mercedes-Benz W114/W115 was the mid-sized saloon model for Mercedes, positioned below the S-Class. Mercedes also launched its first 5-cylinder diesel engine OM617 in this chassis. It followed heavily in the direction set by the W108/109 S-class, which was launched in 1965 and heralded the new design idiom. The car was designed by French auto designer Paul Bracq who was chief designer at Mercedes-Benz for models from 1957 to 1967, a period that included models such as the Grosser Mercedes-Benz 600. Bracq was also responsible for BMW designs (1970–74) and Peugeot designs (1974–96). Mercedes introduced a coupé variant of the W114 in 1969, featuring a longer boot lid and available with either a 2.5 or 2.8 litre six-cylinder engine. While a classic and understated