My car: 08 e70 4.8
My problem: P0050 - Oxygen Sensor B2 S1: Heating Circuit: Malfunction/Open Circuit

I understand that a fuse may be bad. I have spend an hr looking for the darn thing and cant find it.
How dumb of a manufacturer not to have labeled the fuses (my 1st and last BMW, sounds like)... but I digress.

Would someone please help me.
I need to locate the fuse and test it before I get a new o2 sensor.
I have looked under the glove box but all 30amp fuses appear to be ok.
I am looking my mind.

Beers to one who helps me. Thank You.



UPDATE: the write up is on 2nd page (sort of write up)