Originally Posted by Tigumz
Echo the above comments and especially check your ground connection. In my E39 and E60 hardwires, I grounded to one of the screws on the sunroof motor.
I did the same on my E39 and E60 M5s, however I couldn't get any of the sunroof screws to work when I hard wired into the F10. Had to use the wire as described in he step-by-step instructions quoted above.
Current: 2013 Monte Carlo Blue F10 M5 (ED on 9/1/12)
Previous: 2009 Carbon Black E60 M5, 2006 Silverstone II E60 M5, 2003 Sterling Grey E39 M5, 2000 Anthracite E39 540i6, 1998 Jeep Grand Cherokee 5.9 Limited, 1990 Eagle Talon TSi AWD, 1978 Mazda RX-7