from what i'm reading about this part it controls the fuel enrichment until the engine gets to temperature. it would make sense this may be the problem with my 92 300d 2.5 because it starts rough, missing and such and then it's fine after getting to temp.
can anyone tell me where this part is located on the engine, and if there is a testing procedure.
Mercedes® Thermo Time Switch, 1977-1993 - Mercedes Parts And Accessories