My friend's 1995 or 6 S350D dented it's own driver's side door.
The spring inside the door that holds tension for the door to stop at 3 phases when opened, broke and poked a dent into the outside of the door !!
Dealership charged like $400 to replace spring and owner pushed in the dent, but the crease remains. No paint loss.
Just another thing to look out for !
(He had the engine replaced about 2 yrs ago.)
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1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents)

*SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD