yes i have a simmalar problem and i couldnt figure out what was wrong either, i replaced the cap and the smell stopped, mine was so bad that the smell went into the cockpit, i have an 87 420sel

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I can do 111mph with no gas, no oil, and no power staring, threw traffic. Can anyone else do this one a 20 year old car? I think not.

I used to have a g35, now I took this Benz and made it quicker, more agile, and much roomier then the g, **** Japan rock the German engineering.