Drove my 2002 E53/X5 3.0L Manual today and had no problems with the HVAC system. Later that day there were no lights on the unit and the fan was running on high even with out the key in the ignition. I had to empty the entire trunk. take the spare out and disconnect the battery. I figured that I'd let the car re-boot itself. NOPE. same thing. I said AH HA! I have a spare from a donor car I just sold. Went to put that part in and one plug would not go in. That's right the one my daily driver has is a 12 pin. The donor car was an 18 pin. Onto Ebay and found a 12 pin for sale for the right price. Plugged it in and voila I have controls again. Now in am going to sell the 18 pin unit. P.S. I tried to put a for sale ad and I am a premiere member but it won't allow me because it's locked. anyone else having this problem?