The light gray portion of the gray-charcoal ventilated seats in the 01 E55 are wrinkling a bit, even in the upright portion of the back seat. There are little waves that look as if the leather has been pulled out slightly. This is with 8000 miles. The seat has held only my 120 pound wife and only for about four thousand miles worth. I've never seen this with any other leather. Anyone else?