Bright lights, bright lights!

[Phil303]

Can anyone explain how the instrument illumination works on a D2?

At night with the lights on everything is fine, it lights up a treat. During the day everything is visible too - no problems with the multi-function display being dim etc.

However, sometimes during daylight driving I notice the dials & dash have the backlights on yet other times they don't. Is there some sort of auto-sensor for ambient light, or could it simply be a loose connection?