All these cars are made to run flat out. Engine speed is not an issue, other than over revving usually past 6000 rpm. The speedo has marks on it for max speed in the lower gears. 4th is limited by aerodynamics, or lack or it in the W111/108 based cars.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.