try mineral spirits, try it on discrete area first (the plastic) and then u can attack the whole vehicle. That really sucks man. Please let me know how it turns out!
12 Mercedes-Benz E350 Bluetec - Black/Ash - P2, 321
11 BMW 535xi Alpine White/Oyster- Sport, P2, 2TB, 5DL, 6NF
08 Mercedes-Benz CLS550 Iridium Silver/Black Leather - P2, AMG pkg, Parktronic, Ipod (gone!)
07 Lexus GS350 Smoky Granite Mica/Ash leather - NAV, 18's, Sirius, AFS, ventilated seats, & Rear spoiler (gone!)