Ok I think think that the problems that we have are an oil leak, and perhaps a bad alternater we took the 1000 cold cranking amp battery out of the police car and we put that in the benzo. the oil fill cap is broken and we cant get it open with out breaking the inner cap so I need to know if a cap from another manufacture would fit on there? since we do not want the same problem again. After we get these problems worked out then we are thinking about adding in a vortec supercharger and an HKS exhuast . we have not looked under the air filter box to see how we would make a inlet pipe from a intercooler to the throttle body. could someone put up a pic of what the 1992 300E without the air box so I could try and work that out? the car is being used all the time so I dont have much time to fiddle with it.