 Since we purchased our c-class it's been a horrible experience. Engine had tapping noise since day one, dealership said that knocking / tapping noise is normal. It leaks like crazy, you can smell oil buring in the car. We have replaced the rear main seal ($1300.00), valve cover gaskets ($650.00) and now the transfer case has to be replaced, $3000.00. Still smells and leaks. We came from Acura to MB because I have owned several older MB's and loved them but we wanted a new one. The dealership is the worst, Chevrolet dealership disguised as a MB dealership. The car is total junk, never own another one. Going to back to Acura.