Mine is the same way. I'm going to have to guess its normal. The center stack lighting is actually one of my gripes for this car. All the different parts of the center control stack have different light intensities and don't go on and off at the same time. Have you ever noticed that the AC control lights lag when turning the lights on and off? I wish there was an easy fix for this minor annoyance. Oh, and i noticed that the needles on the gauges aren't evenly lit either. A minor flaw that doesn't really detract from the car overall, but still a little disapointing for a "Benz".