Hmm, mine just has a straight downpipe....no flex pipe.

Today, I am not so sure about the leak. I don't see any soot marks, and I don't have an increase in noise. Also the smell is still there, but not as strong. Maybe I have a slight fuel leak that is hitting the block and burning.

Thanks everyone!

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Current Mercedes
1979 maple yellow 240D 4-speed

Gone and fondly remembered:
1980 orient red 240D 4-speed

Gone and NOT fondly remembered:
1982 Chna Blue 300TD

Other car in the stable:
2013 VW Jetta Sportwagen TDI / 6-speed MT