[MikeinVA]

Thanks, Javier -

As it turn out, there is a tech bulletin out on that part/problem. Over the wekend, the battery went dead. After jump starting it and driving a bit to charge the batt., lo and behold, the amp was back. Figuring that I had a ground fault/short of some sort (which would hopefully be cheaper than replacing amp@$465+labor), I took it in to the shop, who found the service bulletin, which described the sypmptoms perfectly- 'amp goes out and then eats battery a few days later'. Merde.

The amp is proprietary to BMW (It may, in fact, be suppied by Alpine, but -). I have a nephew who is an installer at Tweeters, and he said it was a mother - 9 channels, 14 speakers, etc, and replacing it with aftermarket stuff is a bit of a $$ re-engineering effort. BMW - Batter My Wallet. Arg!