Xantia gets unofficial ambient temp sensor.

[andycarter]

I've noticed on very very cold days the bulb behind my fuel gauge doesn't come on in the morning, until I've been driving for a few miles then it decides to get out of bed & join its buddies.
Maybe its the bulb or the bulbholder that shrinks slightly when very cold, can't imagine the thermal movement is more than a few thou though.
It's been like that for a couple of years now, only happens on about 2-3 days each winter so I've no intention of fixing it anytime soon.

[Robin]

Well, none of us like to get out of bed on cold days and you expect a tiny little thing like that to wake up and glow at trillions of degrees centi just because you throw a switch! Take pity on the little chap and say good morning nicely, it's probably the only human bit in the car at that hour!

[weety]

if its any help mine does the same citroens you have to love them dont you