Mine did the same thing when the alternator was broken and the battery was short on juice.

But when the alternator was replaced it "self fixed" its self. Took a few seconds and all lights went off inc. the Engine failsafe message.

Do you have a bad battery maybe?

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2002 X5 4.6iS Induvidual

* Black Sapphire * Shadowline * Navigation * HiFi DSP * RDC * Comfort Seats * PDC * Dual glas * Skisack * Glas moonroof * Fold away mirrors * Loading Floor * Auto dimming mirrors * Siemens Phone * 7" Headrest monitors * DVD * And much much more, One of the most loaded cars from the factory!