Hello, have bought a CL 500 BJ 12/2002 W 215 used almost 2 years ago at 33,500 km for 40,000 €. Now I read before the next service in the inspection booklet that in 05/2006 a body repair took place at 31,5000 km. On request at the branch I was informed that it would have been only painting work for the elimination of corrosion damage (no accident). Probably the corwing was affected at the rear and the C-pillar. If I knocked off the left C-pillar e sounds different than the right. My questions: Where does corrosion come from after 3-4 years with a car that has a new price of over 100,000 € and do I have to worry?? Thanks for opinions and comments.