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Discussion Starter · #1 ·
This is going to seem like a really dumb question but here goes.

Let the wife drive the car the other day (I'm not too smart). She loves driving it cos its nicer than her A6 but she told me that the display for the MPG Bar graph & ext temp was very dull & she couldn't read it.

I told her she was talking nonsense as usual & sure enough the next time I drove it, it was fine.

However driving home yesterday I noticed that the display was virtually unreadable again. Further investigation shows that the display seems to work perfectly when viewed from oblique angles but is completely invisible when viewed straight on. I really don't think its a glare problem cos it was in the evening & dull when it happened.

Anyone got any thoughts?
 

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It's most likely that the photo resistor in the analogue clock or SCC unit is faulty. I've got the same problem with mine.

You can replace the photo resistor but it is such a difficult job, you will probably end up ruining the unit.

The best thing is to look for a second hand unit. The analogue clock unit sells for about £10-30 on eBay and the SCC sells for £25+ on eBay. You could also try a specialist breakers, or just put up with it.

Hope this helps.
 

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It sounds like the illumination behind the display is not working. There's two possible causes for this- either the lamps have failed (although there are 3) or the photosensor unit that automatically adjusts the brightness has faield. The easy wasy to check the latter is to swap the clock module.
 

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I'll check mine and get back to you. I only look at it from the driver's position, so I don't know.

Watch this space.

P.S Knowing my luck, when I go to check it, it will stay brightly illuminated for ages!
 

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Would this still be the case given that the unit appears to be bright when viewed from the top or either side?[/b]
Sounds like the bulbs are working but the polarisation of the display is wrong. It is probable that the photo resitor controls the brightness by varying the polarisation.
When I got my car the EDU was on maximum brightness at all times (the opposite problem). I swapped the clock with my written off old car, which hadn't yet been taken away by the insurers, and that fixed it.
 
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