I just put the car into dyno mode to check a few things...
The initial display voltage was 12.5V
After starting the car, the voltage was between 14.0 and 14.1V
Based on these numbers, is it safe to conclude that the alternator and BCM are working properly?
Is there a way to toggle the display to see the voltage of either battery? My guess is that the initial values I found on the display are for the rear (main) battery.... not the accessory battery.
2006 - E55 Black (Sirius / Bi-Xenon / Premium Pkg with Pano / Trunk Closer / Keyless GO) ...... 45,002 original miles