I don't know about other MBs, but my 87 300E came from the factory with a dark grey painted inner surface of the trunk - the car was owned by my father, and I know it has never been re-painted.
The badge bolted to the left rear fender? Don't know - maybe a cheap way to repair a drive by shooting without a re-paint
Where is it on the rear fender? Possibly the previous owner drilled a hole for a HAM, CB, or car phone antenna and covered it the cheap way when he sold it.
87 300E, 65k miles
[This message has been edited by JCE (edited 07-04-2000).]