The fourth generation SL, denominated the R129, was launched at the Geneva Motor Show in March 1989.

The beautifully engineered roadster was based around a two-door monocoque bodyshell and its sophisticated all-round independent suspension was complemented by a host of active and passive safety features including: electronic stability control, ventilated ABS disc brakes, adaptive-damping shock absorbers, front airbags and an integral rollover bar that deployed in less than a third of a second if the car ever sensed an impending flip.

The cabin was exceptionally well built, covered by a fully automated power hood, and featured such luxuries as memory seats, electric windows/mirrors and an adjustable steering column.

Yet, lurking beneath all the luxury and refinement, was a performance-focused 'grand tourer'.

The SL500 was powered by Mercedes' four-valves per cylinder, dual-overhead camshaft, 5-litre V8 producing 326bhp and 332lb/ft of torque, mated to a 5-speed automatic transmissi...