Original Mercedes E-class W212 S212 Diagnosis interface control unit Internal number: R116 Part number: A1729002809 Condition: Used, slight signs of wear, fully functional The replacement parts are 100% functional unless otherwise stated. Before purchasing, please check the part number to see if it fits your vehicle. If you are not sure, we can use your chassis number (VIN) to check whether the part fits your vehicle. Do you have any questions or do you need other parts? We have many other used parts in stock, such as: Bonnets, bumpers, fenders, headlights, carriers, radiator package, lock carriers, tailgates, doors, dashboards, etc.