I had several very similar issues with our new X5 for the first couple of weeks. The iDrive computer control systems were a mess. As bizar as it sounds, the solution was replacing a battery cable. The cable was not available from the factory, so the dealer ended up pulling it off a new demo they had.

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CPIGUY
Arnie Friedman

2010 X5 3.5D, Alpine White, Saddle Brown Leather
2010 M3 Coupe, Alpine White, Silver Novillo Leather
2008 Ferrari 430 Spider, Red, tan