http://www.bimmerfest.com/forums/sho....php?t=1281462
when any module in the most loop goes down you loose sound and
and they all appear to be bad.
In order of things that fail the amp is up first followed by the Sat or
TCU.Mulf/combox followed by the Sat module.
The amp most often goes down due to water in the amp area.
http://www.bmwgm5.com/Logic7_6941681.htm
http://www.bmwlogicseven.com/?p=3837
There are indicator led's in the L7 amp see the above thread for there meaning
also there is a fuse for he amp and the other modules.
If you put the jumper on the amp Most connector and the SOS error goes out its and indirect
indication the amp may be bad. There are LED indicators in the amp again in the last thread.
Did you do inspect the amp harness in the wheel well shock location?