My 2005 Elantra's steering wheel is starting to fall apart. The plastic "coating" on the left hand side has started to crumble. At first I just thought it was a tear, but if you run your finger on it, it comes back coated with black particles and its only getting worse. Anyone else have this problem? Do you think this would be covered under the warranty? (I should still be within the 5-year/50,000 miles bumper-to-bumper)