with the factory wiring and senders. 180* coolant in a Mercedes engine is the same as 180* in a Chevy.

Just retap the Chevy manifold and oil pressure ports to take metric threads, then size up or down as necessary with metric sleeve-adapters.

You will have to work out the throttle linkage, I haven't touched a 123 chassis in a year, at least.

Most people who buy a USED Mercedes can't afford to bring it to the dealer, and most who buy a NEW Mercedes get rid of it within 8 years.