Hoping someone can help here . . . I have a 2002 A3 1.8T with a Concert CD/radio.

1) The radio is asking for the SAFE code - I put it in correctly and the LCD briefly displays the FM station and then the unit immediately powers off. Powering the unit on again leads to being asked for the SAFE code again. Previously the unit when in operation would switch itself off and on periodically. Also the AM reception was non-existent. Do these symptoms suggest the unit needs replacing or fixing? Power is good to the unit.

2) Looking on ebay for a replacement unit. How interchangeable are the various Concert models between the Audi models, ie will an A4 unit fit the A3, etc? Also, does it make a difference between the Concert I and Concert II models in terms of being fitted into the dash?

That's it for now. Thanks in advance for any help provided.