Hi , this is where i bought them ...
http://cgi.ebay.ca/ws/eBayISAPI.dll?...MEWN%3AIT&rd=1

the picture says 90w/100w input power , but the descriptions says , No modification required , bolt-on directly. Can you guys please check ? Thanks. Because i bought another of those for a friend , but he uses an Mercedes Benz C230 2000 , is there a that big difference between them? He replaced successfully , and he said its working perfectly ... as me , i can't even install them =[