3.46 is the final drive for my W201 which was originally a 4 speed 1.8 but the 3.64 was the final drive for the 5 speed (both 2.0 and 1.8 litre engines)

The 3.92 sounds like a 2.0 diesel final drive.

There was a whole load of information on the Mercedes classic wiki site but the links don't work any more - I can't find the data at the moment it has been moved / removed

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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!