' replacement ' I never did a benz, that bulletproof stuff never breaks !!! I'd guess you could spec anything to the firm doing the work, but your insurance might not be on board. On a newish ride I would expect original parts or you have not been made whole. I have had insurance companies try to cheap out and always hold their feet to the fire. Once they wanted to replace a large aluminum front bumper backer with steel. ( GM N frame ) Shop guy made me wise and we had to go around with the argument about the weight difference not meeting the chassis design for springs, shocks, handling, steering, ground clearance & what not making it unsafe too drive. Were they planning on insuring that?