madbmw

the dealer has had my car well over two weeks now and made some progress. the were able to change the vehicle order and code some of the ccc.. Now they cant seem to get the sound working.. Does anyone have any info that might help solve this.. Is there any rewiring that needs to be done in order to have sound again.. I did all the "hard work' by installing it.. so price tag is still pretty low.. I need help solving this ..