I'm not sure, but it sounds like you're talking about the anti-sway bar...and that bolt should NOT be loose. That's what is "popping", I'm sure. You'll probably need a new bolt...the movement has probably ruined the threads on the existing one.

Mike

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1979 300 SD
350,000 miles
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1982 300D-gone---sold to a buddy
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1985 300TD
270,000 miles
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1994 E320
not my favorite, but the wife wanted it

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