I bought a set of tire from discount about 14 months ago for my wife's '99 SL500. When I went in this week for their rotation they told me they could not rotate the tire because the front tires were worn off on both sides below the wear points. This was due to the fact that they set the air pressures to low in those tire. They only had 14lbs of pressure in them, and they should have been at 30lbs. The tires were rates for 60K miles, but they only had about 10k on them. The new set they put on the rear had 24lbs in them, and they looked fine, but they should have been at 35lbs. Discount would not stand behind their failed work.
They are the ones who set those pressures wrong, but I could not prove that fact. They tried to say the chrome on my rims was delaminating inside, and that was causing them to lose pressure. That was total BS, because both front and back tires had matching pressures on either side. I'll be finding a new tire store next time after this.