A more drastic (simple) test would be to shine a bright flashlight into the rearview mirror (to simulate obnoxious traffic behind you ) in addition to the tape you added to the front of the mirror to cover the ambient light sensor.
Originally Posted by lbjgh
If I get a chance I'll try the mid setting noted above.
2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired:'09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, 01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i, ..., '86 4000CS Quattro, ... too many to list