Hello SLK driver, according to Brembo the brake discs fit with the number 09.A731.10 or 09.A731.11 for many different models of Mercedes. Among other things for the SLK (R171) 55 AMG (171.473) 03/04/ – 02/11. Here the link:http://bremboaftermarket.com/…/Catalogue_Detail.aspx?… I thought the discs at the 55s are always 32mm thick and only with MB to get? Then it seems that there is another brake system at the VA from Mopf on. ? Would be very pleased with an answer. Thanks already. MfG Flo