1. The radio fails to switch on when the button is pressed although> the radio does illuminate with the dash when dark and the headlights> are enabled.>

2. If I leave the radio switched on, after driving for a while> (anywhere between 20 mins to 2 hours), the radio mysteriously starts> working. If I then stop the car, switch off the engine so the radio> stops (but leave the radio switched on) and wait five mins, when I> start the engine again, the radio is fine and works. If however, I> switch the radio off after its been working, trying to switch it back> on as per normal results in nothing.>

3. When the radio is switched on and starts working, the electric> aerial makes no attempt to extend, neither does the motor for the> aerial kick in.>

4. If I switch off the radio after it has started working, the> electric aerial motor kicks in and you can hear it making a noise as> if it is trying to retract the aerial even though its not extended.>

I've checked fuses and wiring that all seem to be fine. The radio is a> standard fit Audi Blaupunkt Delta CC with 6 CD changer. I can't figure> out what's wrong and whether the fault lies with the radio, aerial,> wiring or all of the above. Have been unable to test the radio in> another Audi or try a different model radio in my Audi.>

Can anyone help? Many thanks in advance.>

Regards,>

Vic

Thanks for the reply and suggestions. The radio, CD changer and> electric aerial is all factory fitted. The previous owner had no such> problems, in fact, a week before I picked up the car, my friend who> bought it for me said that everything was working fine. On the day I> picked it up, the radio was wokring correctly although the aerial never> worked from day one as per my previous posting.>

I've checked the wiring and indeed and indeed, one of the DC signals is> permanently hot whilst the other is ignition dependent. Because the> radio only switches on after a random amount of time has elapsed> driving the car, this leads me to believe it could possibly be> temperature related, Maybe a dry joint in the unit?>

Regards,>

Vic