I would say this isn't an isolated problem. My friend has a 2004 Mercedes S55 AMG that was bought and used here locally in SE Virginia. It has 37,000 miles on it, still under warranty as well. Well, I feel REALLY bad for him, as the front fenders/quarter panels are COMPLETELY RUSTED OUT!!! There is actually a CHUNK missing at the bottom wear the 1/4 panel meets the door and the other side has bubbled the paint completely off showing the rust clear as day. Keep in mind, this is a PAMPERED, garage kept car that is professionally detailed monthly for a coast of $150 per visit. Needless to say, he IS PISSED! It too seemed to show up over night. Never noticed it until a piece of the fender flew off when a buffer was used in the area the last time it was at the detail shop. Is mercedes buying the same cheap steel that Datsun and Toyota used back in the 70s and 80s? He refuses to even drive that car now. He had the dealer tow it in, cause he couldn't drive it. Not what you expect to happen when you spend almost a $100,000 on a quality Q-ship.