today i was driving around with my friend in his M5, and it was pretty sweet, but like there was this infinity FX that was behind us, and i could swear the thing was setting off the radar detector, any idea wat it could be?

 

Don't know if the Infinity is equipped so; but some cars are now being outfitted with front distance sensors to help avoid collisions and also disengage cruise control if the sensor detects an unacceptable closure rate. I'm betting that would set off a radar detector.

dheim14