I have an 04 A4 with a symphony 2 bose system. I had a TSB done on it to rewire the amplifier because of sound fluctuation. With the SVC off it still fluctuates and at times sounds like it cuts in and out. Is this normal? should I bag the stock system and just get my own? Its driving me nuts, I can't enjoy a CD or the radio without the sound going up and down.

 

ttt bump

 

i have the same problem
i noticed it whithin a week of buying it when i was still under my used warranty and had it in the shop twice
the first time the service writer said that it could not be duplicated and the second time they "said" they shipped it down the street to the audi dealer and that they said it was a normal feature.
i have all data repair at work and cannot find any tsb's on my 04 a4 1.8t's stereo
im not sure what to do either
i guess i could look up the schematics and find the problem and rewire it myself since its no longer in warranty