I have a 1994 e320 convt and inside the trunk area on the passenger side there is something that is attached to the inside of the rear fender that looks like a plunger It is black and has a red plunger.What is this Thanks jimbo

It might be the emergency release for the fuel lid door.

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1989 300CE

If you pull on it, it will unlock the fuel filler cap.

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Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010