Mercedes w164 w251 (-U29) Brake Pad Set Rear GENUINE oem factory parts Brake Pad Set Rear NOTE: NOT for cars with 18'' wheels (code U29) Mercedes part# 164 420 19 20, check fit below. Genuine Mercedes part, recently made: not been lying around. Please see FITMENT CHART below, under PRODUCT DESCRIPTION. Email us your VIN for any questions.