The dealer only has it becuase it is a painted piece, I bought a replacement mirror cover for my 97 E320 for about $60 from the dealer. Probably for a W140 itll cost much more. Youll have to pay for the part and theyll order it and it will come in about a couple of days. Installation should be easier because the mirror retract but it might be worth paying the dealer because the mirror assembly costs around 500-600 if you break it.