I'm hoping someone on here can point me in the right direction. I've
got a 96 A6 that was originally equipped with the Audi/Bose system (as
indicated by the badges on the speakers). The previous owner replaced
the factory stero with an aftermarket head unit, but left the factory
wiring plugs intact. The aftermarket has since failed, and I have
purchased a stock head unit off of ebay (an Audi Delta). I spoke with
the local audi dealer, and he told me that as long as the radio was
taken from another 96-97 model (A4,A6,A8) that it should work with my
existing system. Sure enough, when the system is plugged in, it powers
on and says "SAFE" on the display. Here is where things get difficult.
All documentation I've seen says that to enter the code, you must hold
down DX and FM1/2, yet when I do that, nothing happens. The radio
continues to say "SAFE", and never enters code entry mode. I have
atempted to leave the radio on for an hour (with the ignition off) but
still no luck. Any ideas?