Hi to everyone!
I have troubles with my internal light-dimming rear mirror.
Sometimes it does not dim even if it is turned on (at night obviously).
One time I pushed one of the three light buttons on the roof (front), then the mirror started working again.
The light buttons and the rear gear insertion deactivate dimming function.
So I thing there is something not working on one of the three light button.
I would like to unmount the ceiling light but I fear to broke it.
How do I safely unmount it?

Please help!
Thanks.

Stefano.