I don't know why so many manufacturers including Mercedes use this particular tire. These were expensive, noisy when new, badly cupped near the end of their life, and were bald as a ping pong ball at 25,000 miles, well short of the claimed treadlife. I drive about 25,000 interstate miles a year for work, so I thought I would at least get the claimed 40,000 miles. I had my dealer check the car out (still under warranty) to make sure the car wasn't causing any of these issues and they assured me it was these tires. They also couldn't believe I got more than about 20,000 miles out of them, which is the tread life they usually see.