Thanks again for the heads up.

Dis & Reconnecting the battery did fix the radio / audio issue. However, the X5 wouldn't start up normally.

Upon ignition, the engine would start, but it would not hold unless I keep pressing the fuel pedal. As soon as I let it go, the engine would stop.

Not sure if it's to do with the battery level, but I seem to remember that this had happened before when the battery went low a while back.

Anyway, the car is at the workshop now and hopefully it's something simple.

Thanks again for the tips.

__________________

Here's the Photo Album of my (sold) X3; Album of my (newish) X5 is on the way!
(WARNING: read this before you buy anything from Umnitza)