Description:

Used OEM ECU part number A 278 900 13 00.

You are responsible for if it will work for your vehicle. I think it works for: CLS63 GL63 GL550 CLS550 M157. I know it works for a 2014 GL63 for sure. Just check your own ECU and if the part number is the same, it will work.

If you plan on tuning your car, this can be flashed by the tuner to have two ECU's (one for stock map when visiting dealership and one for the tuned map).