Hold down nut for front strut may bacome loose on Mercedes-Benz C350

A knocking noise from the upper front strut area can be caused by the hold down nut for the strut coming loose and can be repaired without removing the strut assembly.
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Average mileage: 58,500 (37,000–80,000)
5 model years affected: 2006, 2007, 2008, 2009, more2010
7 people reported this problem
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problem details
2006 Mercedes-Benz C350 80,000 mi,
my car makes a knocking or clicking sound when i turn the wheel or go over a bumb sometimes but mostly while turning the wheel to park or anything like that.