I have the wierdess problem i ever had since owner a car. I have a 97 E420 and the gas cap keeps getting stuck. My previous gas cap i had to pry off with pliers at the gas pump. So I went the dealer and purchased a brand new cap and the same thing has happen. I am so puzzled at this point as to what to do. Can the gas cap be adjusted I mean this problem just started happening out fo the blue. Please Help!!!!!