My second car, a 1992 300 SL (80.000km and in excellent condition) has one ugly detail. The Gear shift knob's top part is pealing off, leaving the white plastic underneath to become visible. The lower part of the knob is made out of grey leather and this is still fine. Is this a one piece object and is it easy to remove/replace? Also tips for where I can buy it are welcome. Something tells me the MB Dealer will charge top prices and I can't find one on eBay...