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

Problem Description and Possible Solution
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.
Problem Data
RepairPal Verified
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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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.