Hi all,

I'm looking for a little help. I just had a k40 Calibre Bluetooth DL (front and back) and front and back Bluetooth Laser diffusers installed on my 2006 B7 S4 Avant. It was professionally installed by a certified k40 dealer.

Ok so the problem is this, after running the car for an hour to an hour and a half, the unit stops responding. It no longer responds when switching it over from City to Highway, Tone to Voice, etc. Basically the brain goes to sleep and won't come back on until I shut the car down then restart. I did the obvious and changed the remote batteries. Still no go. Then I brought it back to the dealer and they replaced the brain and the remote (leaving in the original sensors). Same problem...after an hour it would just stop responding. A handful of calls from the dealer to k40 tech support yielded nothing but frustration.

The dealer (who has been great) repatched the power thinking that the circuit it was on would go dormant after an hour. After 3 repatches and many trips to the dealer, no luck. Then while checking all of the connections (there's only really power and ground..very frustrating), he found that the front radar cable was overheating from going though my engine compartment. He replaced the front sensor, changed the cable and reran it up and over my Carbonio (not the prettiest, but at this point I'll take anything that works), the system was reset and still no luck. We even had a Fluke meter on the circuit and it was fine at 12v, so the power isn't the problem. I'm going back in Monday to change the brain for a third time and change out the rear sensor. If that doesn't work, then my only option will be to remove it entirely and return it to k40. I really don't want to do that, I love the unit when it's working and will have a really hard time losing my laser diffusers and going back to my Escort suction cupped to my windshield and plugged into the lighter.

Any insight, advice, help, etc. would be greatly appreciated. Thanks.