whats the easiest way? last time i took the glass off. does it all open up at the back?

Err - I assume we're talking about a 300 here? Just I've never heard of anybody changing a sidelight bulb that way before.

Rear of h/lamp unit - round cap - unscrew - reveals both fittings for main/dip and sidelight bulbs.
To do n/s on 340 you will need to lift spare wheel out.

Mac.

thanks

as soon as i touched the bulb it fell through into the bottom lol

them bulbs are a twat, mine fell threw to lol, mate at a local garage tryed and same thing happened, have about 3 bulbs a side lol