Still haven't got round to replacing the bulb behind the heater control panel in my Octy yet, but with the nights drawing in now and more driving in the dark, it's starting to bug me again.

Does anyone know what type of bulb I need? I know it's a 1.2W 12V wedge base but do I need a 5mm or 10mm (T5 or T10) replacement?

I know the easiest thing to do would be to look at the old one but it's dark up here when I get home from work in the evening and I'd like to order a replacement asap.

Many thanks.

Its a 5mm bulb. Had to do mine just after I bought it.