I just bought the 1999 Mercedes-Benz C-Class S202.II C250 Turbo Diesel Estate Auto with no gearbox. I would like to buy a replacement gearbox(automatic gearbox) and the dealers are all asking me about the part number(supposedly to be on the side of the gearbox). Can some please advise on the part number as I am unable to obtain the part number from teh previous owner. The engine's VIN is WDB2021882f882076 if that will assist in any way