If you never wax it or wash the car, and leave it outside I bet the paint would peel. Wow I just read the whole thread, these cars are junk! If I had a W210 that was rusting I'd dump it and buy a BMW. I'm surprised a problem like this never surfaced in the US.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200