Hi, I have recently purchased a 2013 X5M50d. The centre console buttons, specifically Auto hold, camera button and downhill descent don't always work when pressed but DSC is ok. They seem to work whenever they decide to and also the Auto hold decides to turn itself off whenever it wants, normally the next time i get in the car. There are no signs of anything spilled or damage as far as I can see. Has anyone come across this before and how was the problem resolved? Thanks