This is a stupid question, but i just bought my 07 GX470 and when driving at night the accessory buttons where the tape deck are don't light up. I'm assuming they are supposed to but before i go to lexus i wanted to ask you guys. It's the SEEK/TRACK, PWR-VOL, AM SAT, FM, TAPE, DISC/AUX, TUNE FILE. all of those.. everything above lights up so i know it's not the dimming switch. They ARE supposed to right???