Dufour spotlight mounting problem

[blauohnewasser]

Hello together!
I have a Dufour built in 2000 with a spotlight that i need to take of. (Precisely it's a 32 Classic, but i guess they've used the same spots in several models of that time.)

It's a black cylinder which i cannot figure out how to detach from the cabin roof (see attached image). Does any one have a clue how i can get this down without ripping it off? From another spot i have (which is a bit loose) i know that it is mounted to the ceiling with 3 screws).



Thanks a lot in advance!