Mercedes wiring harness - RestoreYourMercedes Customers with AMG or Brabus tuned motors, where new replacement harness costs way more than rewire or NLA, prefer rewiring and keeping original harness. If you want to buy new harness I would order it from dealer according to your car VIN number and double check part number on your original harness. Mercedes Benz Wiring Harness | Auto Parts Warehouse GENUINEXL WIRING HARNESS. Replaces OE Part Number: 211-440-05-07. GenuineXL Wiring Harnesses are premium replacement parts designed to replace your original unit.