If nobody is in the car and the doors are already locked pushing the lock button on the key will cause the interior lights to come on for a minute or so. Then they fade out again.

Something in your pocket pushing the button? Or do you let the kids (if you have any) play with the key?

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'05 X3 3.0i Alpine White/Gray Leather/Alum. Trim
Sport/Steptronic/Servotronic/Panoramic
Prem. Sound/Staggered 18" Style 114 Y-Spokes