Steve:

I have used a dent removal company with good results. My 1998 E320 was parked under a tree last summer (Never do that if you can help it) and either something fell on the left front fender or it was caused by vandalism. There was about a 1" long crease that was quite noticeable, but no paint damage. They worked on it about 45 minutes at the dent removal company and you can not tell where the original dent was. Generally, if they can get at the back side of the dent it can be fixed. If you go this route, I would check with your Mercedes dealer to find out who they use. I then would ask the dent removal company to assign the BEST technician they have to your car.