I have a 2005 Mercedes Benz Viano. It has an instrument panel (speedo, rev counter, etc) with a small orange LCD display. It looks a bit like this:
Sometimes, after about an hour's driving, the backlight on the LCD panel goes off (so the orange light in the image above fades to nothing). The vehicle has not yet been driven in the dark, it has only been driven in fine conditions during the day, so I do not know if this is just the LCD or all backlighting.
My questions are:
- Has anybody seen this before and if so can you suggest a fix?
- If the LCD panel fades out, does this also mean that the illumination on the speedometer and other dials would also fade out (but I have not noticed it, because this was during the day) --- or is the backlight of the LCD on a separate circuit from the backlight of the dials, so that if one goes off the other may still be operational?
I hope this is clear. Comments welcome. Thank you.