The Symphony II Unit on my 2001 Allroad does not have any Backlight with the Instrument Backlighting, also the Steering Wheel Controls have no Backlight anymore, then the Radio does not turn on or off with the Ignition and has to be switched manual. Sometimes the Steering Wheel Controls just stop working incl. the TIP Controls, when you then turn off the Radio the Tip Controls work again and when you turn the Radio on again its Steering Wheel Controls also function again....... Anybody got any Idea where to start ???

 

Sounds like you lost the CAN buss wires, or there is a problem with the can controller. It's just a guess.

 

Thanks.....Whats the easiest way to test this ??? Use Vag to log onto the Radio ??

 

You can try there might be some stored codes.

 

fuses?

 

Does anybody know where the Can bus Connection at the back of the Radio comes from or originates ???

 

From the center gauge cluster (speedo, tach). There yellow wires.