2005 bmw x5 96k miles well maintained, I have noticed 2 things over course of ownership, one is around 38mph it seems to have a on off dead spot that you can feel in engine and only in this range, you will be cruising along and feel like a second of dead spot over and over again? the second was occasionaly when at a light and go to take off there is a delay then the vehicle slames into gear almost like there is slack or play in something, this is only very once in a while. I took it to BMW in NH several times while it was under the cpov warranty to be told first it needed a software update only to find it made no difference, then i was told it needed front end bushing at 75k miles for 1100$ I declined per my own techs advice. Any ideas on both items? Thanks Rodney