i had same prob,drivers door i guess.wel wot i did is take the door casin off,then pull the ruber seal of then ul see a black box coverin the door lock take that off,u may need to take sum bolts of,once u do tht ul see ya lock.ul see a plastic clip slidin up and down a shaf clip it out get some cotton wrap it round the plastic wot slides up and down the shaft coz its worn.,cick it back in centre of the shaft and put it bk together...uve save yaself 80 pound..
benny
November 2009