Premature wear in various multi-link suspension components can cause noises that are difficult to diagnose. Worn suspension parts can also cause uneven tire wear and create steering alignment problems.Google+
Car Problem Reports
Audi A4 Quattro Premature Wear in Multi-Link Suspension Components May Cause Noise
Audi A4 Quattro Problem
Average Mileage: 101,500 mi (81,000 mi - 140,000 mi)
Visitor, 2007 Audi A4 Quattro, 85,000 mi
Very poor tire wear and gas mileage as a result. Replaced all upper control arm bushings.
Also replaced both left and right control arm busihings. Threw down about $765
Control arm bushings worn. Replaced complete front control arm set.