For some reason BMW saved about $1 and left out the bulb which provides backlighting to the temperature dial on the optional Rear Climate Control.
The opening is there. The wiring (pin #7 & #8) are populated on the wiring harness leading to the rear vent. But the wires, bulb holder and bulb are MIA.

I can't seem to find it in ETK...




Here's the wiring...