Bought a 2004 2.5 about 6 weeks ago, all was perfect but recently with the bitterly cold weather I have some issues with the stereo. It is the 10 speaker set up with Lear amp in the boot, not the DSP one though.
In short, I only have intermittent sound. The bizarre thing is, is the car is on the ignition without engine running and I have no sound, if i unplug the amp, and then plug back in again, the sound starts/returns but as soon as I start the engine it stops again and won't work again until I unplug the amp and start again
I have checked the amp and it all looks ok, and no corrosion etc associated with being under water.
Does anyone have any ideas or know of any bmw audio specialists?