Designed in 1984, the R129 was based on the shortened floorpan of the Mercedes-Benz W124 and featured many innovative details for the time, for instance electronically controlled damping (optional) and a hidden, automatically extending roll-over bar. The R107’s rather dated rear diagonal swing axle gave way to a modern multi-link axle. The number of standard features was high, with electric action for the windows, mirrors, seats and convertible top.
The SL 55 AMG was sold in the R129 bodystyle from 1998 to 2001 in limited numbers (5.4L V8, 349 hp at 5500 rpm). Only about 300 cars in the SL-class were customized by AMG prior to 2002.