Yes, mine has been like it for a while now, booked in for Friday to have a new control box fitted to the Sat Nav and a new Stereo head unit.
Other side effects are that the battery will go flat if the car is left for about 6 days without use, the stereo sometimes (well all the time for me now) will have no sound.
You could try a hard reset before going to your dealer. This can be done by disconnecting you battery for about 5 minutes, if this doesn't work then its a dealer visit I am affraid
