I don't often drive our 5 much at night, but I noticed the other day that none of the buttons light up on the head unit. I think it's a bit strange especially considering that the steering wheel controls do light up. Media, disc up down, memory numbers (1,2,3,etc), nothing. it's like a big giant black hole above the hvac controls. Is this right or did I mess something up when I put my auxmod in?