That is strange, maybe someone else can chime in on the headlight knob removal.

On the center vents..... the legend i.e. the red or blue rectangle or arrow will not illuminate. Only the, what looks like an LED will light up. I checked both my cars.

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Regards

Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750