Cracked strut tower bushings may cause knocking noise on front end on Mercedes-Benz E320

Problem Description and Possible Solution
A knocking noise from the front end can be caused by cracked strut tower bushings.
Problem Data
RepairPal Verified
Average mileage: 93,250 (58,000–128,500)
3 model years affected: 1994, 1995, 2003
6 people reported this problem
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My 2003 E320 Sport with airmatic suspension is also making a horrible clucking noise when driving especially over bumps. Bushing towers? Is that right?