I hear you on the cramped space back there. I really want a tuner, but I don't know if it would even fit. I also find that the volume is just a tad soft with the stock amp. Did you screw the car dock into the car, or did you use the tabs? I have a kind of a crappy install because I don't have a drill to make screw holes and the tabs don't work so well. Any tips?
Dan

95 M3