Same here, I usually exit the car with the my iPod current playlist displayed while it was playing music. Later on I noticed when I go start the car it would still start with the music playing but the External Devices Screen is displayed, or even the GPS map which I know I did not navigate to (I hardly use the GPS).

At first I thought it was due to the removal of the iDrive startup disclaimer nag I removed (via coding) but I guess not.

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2011 Black Sapphire X5M