The general consensus is that fuses are the problem, the ones in the glove box. For good measure, I usually replace the fuse with a new one, just in case. If you don't have new ones, you can pull another fuse from another non-essential circuit (i.e.: power windows if it's the same amps) to test out. I'm curious why they'd put in cigarette lighter blanks?
Anyways, I've heard that car chargers will blow fuses. Not sure why that would be but some owners unplug their car charger when not in use. If replacing the fuses check out, then my next guess is wiring. I've heard these had problems with that.
Also, if you have the manual, give that a look see for fuses; they've probably hidden more somewhere. That's all I can give you. I don't know much about these cars. If it was an E32 on the other hand....
