I just had a baseball-sized hood dent repaired on a VW by a place that specializes in paintless dent repair. All of the cost was in labor, but the person who did it has been doing nothing but pushing out dents for the last five years. It came out beautifully. There is the tiniest of wave you can just barely see if you look carefully from the side, but it would almost have to be pointed out to you. They made the point that while a body shop may push dents out sometimes, a paintless place does nothing but. I'd recommend the process whenever the paint is undamaged. This particular shop also did minor paint repair, and was very proud of their Mercedes certifications.