Originally Posted by Alan Z

Ok the current set-up for my DVD players output was via the 3.5mm AV In socket at the rear consul. When the installer first recommended its use I could obviously see from their perspective the simplicity of this installation. However I didn't like the fact the plug could be removed and the depending upon its security and orientation within the socket it would also determine the quality of picture and sound received.

I asked for a better solution and like you wanted to achieve true Stereo sound. That said all the installer then choose to do was hard wire the DVD's output to the inside of the AV In socket. This ensured good picture but mono audio. This is how it currently remains.

It would appear that the one sure way of obtaining Stereo sound is to use the AUX input which then means you sacrifice the AV feed to the dash monitor. I am very doubtful whether both AV and AUX In feeds could be used simultaneously but can't say for certain? I have asked BMW for help on this matter but nothing as yet has been forthcoming!