E32 GM general chassis electronics module re-initialize
 

I added the info for E36 too, as some also have E36

E36:
Electric window one touch re-initialization
If the battery is disconnected, or the regulator is serviced, the windows must be re-initialized to enable one-touch up/down and pinch-protection.To "re-initialize" the windows, fully open a window. Hold the button to raise the window and continue to hold 5 seconds after the window closes. Repeat for other windows.

E34/E32:
When the general module is connected to the vehicles electrical system, it will recognize (and store in memory) the vehicle configuration, such as:

- with/without power windows
- With/without power sunroof
- with/without wiper contact pressure control
- with/without headlight washers

Important Information
All general modules must be plugged in only after disconnecting the vehicle's battery. If the vehicle's battery is connected when the GM is installed, undefined signal contacts can cause an incorrect vehicle configuration to be stored, resulting in the impairment of one or more of the above-mentioned systems. If one or more of the GM functions are impaired in this matter, the GM can be "cleared" by disconnecting the vehicle's battery for at least ten seconds.