If not fuses, alot of BMWs came with a circuit breaker on the right side of the steering wheel just above the knee bolster. If neither of those then its gonna be your comfort relay. Its located under the steering wheel behind the knee bolster. Same thing happened to me had to drive on the interstate for 2 hourse with all 4 windows down.
PRESIDENT OF THE OVER 10 YEARS OLD AND UNDER 100K MILES CLUB
1993 325i 5spd
Benfer Performance Intake
M-tech Pedals and Shiftknob
Bavarian Auto Floor Mats
Wheelskin Steering Wheel Cover
Panasonic Head Unit
Euro Projector Lights w/ black Housing
Black Housing Clear Corners
MORE TO COME!!
<img src='http://plaza.ufl.edu/dunna/Pictures/banner.jpg' border='0' alt='user posted image' />