This is a simple job that does not seem to be covered in the owner's manual, and there is no obvious way of access in the bulb. I used my plastic trim removal tools, so reduce the risk of damage. I carefully probed around until I was sure where the release catch is located - Now you know. The clue is seeing which way the bulb is fitted.
Inserting tool to feel the catch.
Lever to tool to release the catch, popping the light fitting out.
Better view of the light fitting.
Standard 501 5w bulb.
The courtesy lights access is similar.
Near the centre away from the switch side use a suitable tool to lever at the hinge side of the lens.
The lens comes away easily.
Working the other hinge.
Close-up of the hinge.
The lens removed showing the hinges and the tag on the switch side.
Another view of the lens.
The switch side of the lens and fitting.
Good access to the bulb after removing the lens.
A photo from 1½ year ago when removing a dead insect, that was there when I bought the car.
The T27 uses 501 bulbs for all the courtesy and vanity lights. May work with LED versions.
I had to remember to slide the mirror cover open, to switch the vanity light on.