Folklore about 200mph+ runs is corrected by marque experts: ungoverned the car is RPM-limited to roughly 162-164mph, and only with taller gears and a 6.0L can it reach the low 180s. An EPROM to remove the top-speed limiter is available for autobahn use.
Top speed and the governed limiter
Mercedes-Benz 500E / E500 (W124) · driving