My guess would be to unplug controller or power fuse to it. Then plug it back in with the key OFF and in your pocket. Do all this with the key out of the car.

With it back together turn the key on and leave it on with the engine off for a couple minutes. Then turn the key off for 10 secounds and then try it out.

This is not the way I would do it and not necessarily a fix for anything.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician