Btw, where did you put the empeg in your BMW ? Still have to do my install and am wondering if removing the factory headunit has had any adverse effects/results for you either with the onboard computer (clock ?) or the BMW service/dealer ?I replaced the in-dash tape deck, since it was clearly not very useful to me. At least in the Z3, you've got a nice single-DIN slot in the dash. I wouldn't know what to do in the newer cars that have that over-sized stereo.
I don't have an on-board computer, just a clock, and it's still ticking along fine. I can't imagine the stereo getting too wrapped up in the rest of the car. As to BMW service, that's an interesting question. I haven't had the car to the dealership since changing stereos. I also removed that awful decal in the upper-left of the front window saying, effectively, "if you dare install any non-BMW electronics in your car, the economy of your country will collapse and your face will be covered with acne."
Meanwhile, Roger asks if anybody has pictures. I have a poor one that will give you the gist of the red display:
http://www.cs.rice.edu/~dwallach/empeg1.html. Note: in this picture, the illumination looks almost orange-ish. It's really more red-ish. BMW-heads should look at the clock and other gauges and pretend they look like a normal BMW.