Technical Dash lighting auto dimming problem- Dealer can't find the issue!

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Technical Dash lighting auto dimming problem- Dealer can't find the issue!

It’s the ambient light sensor.

Just found another thread that says the same - do you know where the sensor is located?

I ask because it seems to work randomly - I was sitting in traffic on the M25 this morning and the lights being on or off didn't correlate at all to the (apparent) ambient light around me. Knowing where the sensor is would help me figure out if it's working correctly (and tape over it!)
 
Knowing where the sensor is would help me figure out if it's working correctly (and tape over it!)
Wouldn't that have the opposite effect - lights going to minimum because the controller thinks it's dark ?

The sensor is just above the 95kph/60mph marking in the speedo cluster.
Where is that on the digital dash ?
 
Wouldn't that have the opposite effect - lights going to minimum because the controller thinks it's dark ?


Where is that on the digital dash ?

No, backlight dimming is done in the menu (headlights have to be on for it to appear). The sensor switches the speedo backlighting either off or on according to ambient light - in the dark they go on and when light hits the sensor they go off - bit pointless really.

Never used the TFT display so I can't answer the second query.
 
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