Just picked up my special order XTS Platinum AWD Black Raven with Very light platinum/Urban/Cocoa, Opus interior Thursday December 20. Put 120 miles on the car when my dash said Service Driver Assist. All cruise functions quit. Next day in the afternoon it worked again. Saturday went off again. Any one else have this problem? Love the car other than the CUE problems that every one else has till GM gets good updates. I wish it had better headlights with automatic dim like my wife's 2013 E class Mercedes. That car lights up the road. DADDY