Iphone is set up and connected but contacts come and go and am left with no names - just numbers and therefore bluetooth cannot recognize contacts. Also this changes - some names appear, and others will appear but it constantly changes. Never works properly. I have taken it to the dealership about 6 times on this issue and they can not fix it. I ended up calling MBUSA office customer service and they said they can't fix it. The best they could offer me would be a $1000 credit towards the purchase of a new car. Rediculous!