Torque thrust bushings in the front suspension may crack and leak oil, this causes steering alignment problems and excessive tire wear. Another symptom of a worn bushing is a clunk or thud noted when turning, on hard acceleration, or hard braking.Google+
Car Problem Reports
Mercedes-Benz CLK500 Torque Thrust Bushings May Crack and Leak Oil
Mercedes-Benz CLK500 Problem
Average Mileage: 50,342 mi (36,684 mi - 64,000 mi)
Visitor, 2006 Mercedes-Benz CLK500, 36,684 mi
This vehicle will NOT hold a front end alignment. We've had alignments done at an MB dealer's service center and an national tire company. We are about to replace the front tires due to excessive wear on the outer tread for the fourth time! This vehicle has less than 40,000 miles and we've already gone through three sets of front tires! The MB service rep said we should have the front end alignment done once each year regardless of mileage. I've owned vehicles for 42 years and this is the first I've heard of that needing to be done annually. In fact, my Chevy Tahoe has over 120,000 and I've only had the front end aligned three times and only when installing new tires.
Visitor, 2003 Mercedes-Benz CLK500
Same thing with the tire wear 4 sets...
My CLK500 has less than 100,000 miles and I have already had 10 sets of tires on it.