Last week lost most of my transmission fluid because of large leak. Mercedes mechanic was very familiar with this problem due to the at plug adapter. He replaced the adapter, new filter and gasket and 5 ltr. of trans fluid at $22 a pop. He also fixed the small oil leak I had which is also very common in xfires. After cleaning and resealing valve covers, replacing gaskets & replacing breather hoses. $900 later my roadster in ready for spring!!