fer sure... :wink:

Have they tried disconnecting all of your mods (stereo, neon's, etc.)? When I was in getting my Upsolute, there was another guy at that shop that had done so many mods to his car (not a XF) nobody could figure out which way was up any more in the electrical system. His brake lights were stuck on all the time, but would go out if he hit the brakes, at which time the DRL's on his car would come on. His turn signals also made the brake lights flash off and on. If he opened the door or turned on the interior lighting, the moonroof slid open. The car was TOTALLY POSESSED. All concerned said something like "hmmm.... must be a short somewhere". Well, duh.

I guess moral of the story is don't do too many mods too close together without fully testing each and every one individually? I guess on the good side your dealer doesn't think the ECU upgrade caused this? Have you got a refund from the Upsolute dealer?