Just got a 09 750 after two M5s and finally upgraded my Valentine 1. I am constantly getting false alarms from the rear. Anybody else ever run into this problem. One ticket in 8 years of M driving so do not want to give up the V1 but find myself turning it off more and more.
Maybe call Valentine and see if they have something to say about it? Always potential for any upgrade to have unforseen glitches that haven't been solved entirely yet.
Lots to read here too. http://www.bimmerfest.com/forums/showthread.php?p=6380526 http://forums.5series.net/topic/107217-audis-causing-radar-detector-falsing/
I'm having this issue too. New 750. My V1 goes crazy when the cars on. I just figured it was all the technology in the car causing the radar to go bonkers.
