We own a 2001 c-240 and we found oil on the ground. We brought it to the shop (not the dealer) and got the oil pan gasket and filter were changed. It still leaked. Its coming in between the engine and the transmission. Any ideas?

 

Then it is the gasket between the engine and transmission or it could be the rear main seal leaking. You need to find out if the oil is running down the tranny case from the rear main seal.