Thanks

That helped.
As previously said, the key here is to push the speedo cable, pull gently, repeat. and knowing the oil level gauge (which is not working although the "balloon" seems fine) protrude helped as well to avoid any big scratches on my pristine dashboard (definitely the best looking part in my Coupé).
I replaced a couple of blown bulbs.
Unfortunately (or fortunately), earth connections behind the dashboard were pretty clean. No oxydation whatsoever. I removed/put them back as it usually scratches a little bit.
Oddly enough, the W1.2W brand new bulb I put for my left indicator seems a bit "darker" than the right one (and when using hazard lights, it seems to light 0.2 sec after right indicator light).
So now, I have to work on another topic that is a MOT (in French, Controle Technique or CT) issue, the indicators light flashing way too fast.
In the past I could manage, while cleaning earth connections in the engine bay to make them stay "stable" 6 to 8 seconds before it goes crazy, but now, it's instant crazy.
I saw a couple of posts including the one that fixes the indicator flashing unit (by unfortunately taking away the very nice handbrake flash

).