I don't know if number of coats is an issue. They probably coat just enough to get the color established and cover with clearcoat. Millage on a Benz is usually 4 to 5. One mill is about the thickness of a cellophane cover on a cigarette pack.

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95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K