A bit late to ask
, but did you find a solution? Mine just appeared after driving on a bumpy patch of road. I had to drive 200 km with both lights on until I got home ( car was like usual). Then, today I checked under the car and cleaned everything with a water pressure gun. Before that, the car was parked for three weeks, and due to winter, there was plenty of salt.
From below, everything seemed right; however, the OBD-II showed an error code C1200, indicating a short circuit in the EPS/ABS - front right. I will check the fuses tomorrow just in case.
My Forfour 454 is amazing, with more than 200 000km, and despite its age, I want to keep it until the last day.