Seems that my dash light is always on from start up to shut down no matter what I have turned on or off. Knowing that it only checks for exterior bulbs is a help. I'll check the 3rd (center brake light) again. I do have a cracked front headlamp (small stone chip) but the headlamp works in both hi/lo beams just fine.

__________________
1999 C230 Kompressor
1998 C280 Son's car
1999 C280 Totaled by other Son