Flashing Headlights
This must be a reminder that the keys are in the ignition.
. The only example I've seen to this was when I once turned on the heated seats in my friends W124 and the little red diod started to flash to indicate that there were not enough battery power to do so.
The headlights pulse off and on till you either start the car or remove the key. I have only been able to duplicate it at night.
After giving a rest of several minutes, it did it again. The sidemarker and parking lights (front and rear) flash six times after the MFD reappears.



