There are loads of online calculators that can help with this (if you can't do the calculations yourself) but you need to know the gearbox type to find out the gear ratios and also figure out which final drive ratio is fitted.

If it is a factory 5 speed then there's a chance Mercedes fitted a lower final drive ratio differential - remember tyre size is also important and that real world differences might make things ever so slightly different from the numbers

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!