They said it does not occur with more modern instruments that use LEDs. I can't imagine why they have not changed to LEDs if that is the case.
Has anyone tried fitting LEDs instead of the bulbs?
The current Roadster 3.7´s + the Plus 4 GDI´s have LED instrument lighting as a standard.
But - guess what happens?!
So "ventilation" is the soultion (if there is any...)