A lot of owners have complained that if you are listening to I-pod tracks via blue tooth and switch off the ignition, when you switch back on, the device always goes back to the first track and it takes a bit if time to download the data. There is a Multi Media System upgrade available under warranty in which the blue tooth module is replaced free of charge. However, it seems that dealers have been told that this work should only be done if the customer insists. The repair has been given a reference number which is RO56/14. I believe there is a bit of a backlog on the equipment side so you have to wait a bit to get the work done. If your car is new enough it might already have the upgraded module, not sure about that but the symptoms are pretty obvious, mine was registered in December 2013 and needs the upgrade. There's some discussion about it on the owners club site.
Doug.