Dealer replaced the speaker amplifier.
This appears to cure the fault.
But doesn't stop the alarm from going off, when least expected
This friday due to have the alarm sounder unit replaced as well.
The man from Audi roadside assistance came and did a diagnostic with his laptop computer. Amazed to see a history log of faults that the car remembers. Now one of those gizmo's would be useful.
Oh, and the dealers replaced the boot numberplate light covers as well
Full marks to Parklands Audi for helpfulness.
Poor marks to Audi for having the faults in the first place
1.6FSI 2003
mw