147 sidelight....
 

ISTR someone mentioning that it's a bit tricky replacing sidelight bulbs -
dealer has just quoted £20 to do so as part of service (short shrift
given....)?

It can be easy or tricky...

Have a go, take the back headlight cover off, try and pull the black
bulb holder out. You will need a mirror and torch. If it comes out
easily then fine, it should just pull out with very little pressure.

If it doesn't, I'd take my =A320 to the dealer and get them to break
the bulb holder instead! (It is not available as a separate part, only
as part of the headlight assembly). They break very easily, after
which you are into a whole load of hassle (about 4 hours and some long
nosed pliars in my case!)