Originally Posted by 335ixGT
If it helps, my M Sport 335i GT does dip the passenger side mirror, only if the mirror adjuster switch is set to the driver side (as several folks have explained). I have the Driver Assistance and Driver Assistance Plus packages
Interestingly, if I put the car in reverse with the switch in the passenger side position, and then select the driver side position, the passenger side will dip. Switching it back to passenger side (while still in reverse) will "un-dip" the passenger side mirror.
FWIW, in my 2003 330i, (without mechanical/electric folding mirrors --they are manually folded in), is what 335xGT describes as exactly what I have in mine.
Might be worth physically examining the button cluster on your driver's door. While mine vehicle is a bit older, the concept should/could apply.