Unlike the Disco 1, with the D2 you cannot just change the springs for pocket money. You need to shell out £70 odd quid a side for a whole door lock mechanisim to replace them!
I lived with the drivers door not unlocking with the fob for a year or so, but when the passenger door gave up that was the final straw!
Here's how to change them:
This write up is based on a drivers (key entry) side
Part numbers for the front doors are:
FJQ 102880 - driver
FJQ 102890 - passenger
T40 Torxs bit
T25 Torxs bit
Time: 1 - 1.5 hrs
First remove the door card, by undoing the screws and prising it off gently and lifting out the window trim, then remove the wing mirror.
Then slice though the plastic with a knife to give you access to the inner door and in the top corner under the mirror to reveal a bolt head.
You will also need to open up the plastic for the retaining screw (drivers side only)
Now unclip the locking button from the green clip and remove it
Now the release cable for the internal door handle
Then undo the white plastic retainer clip from the exterior handle rod, (hold some pliers on the tab, then slide a flatblade scredriver into it and the cover will pop off.)
Now move onto the window frame.
Locate the bolts at the bottom of the window runners and remove them
Remove the T40torxs bolt on the slam side and the hindge side and the 13mm hex from under the plastic.
Lift the window frame up enough to get the wing mirror connector out from the hole.
Then lift the frame up higher (4-6") and chock it with something.
(For Drivers side replacement only)Next remove the exterior door handle by removing the single T25torxs bolt, then pushing the whole handle assembly towards the front of the car, it only needs to move a few mm then it will pop out.
now remove the three T25torx from the slam side (and the retaining screw, drivers side only)
you should now be able to drop the lock out, undo the electrical connector on the way.
Retain the white clip for the new mechanisim
Fit new lock as a reversal of these steps, take time to open and shut the door when refitting the frame to make sure you've got it aligned properly, adjustments are made at the two 10mm bolts at the bottom of the window runners. Remember to tape up your plastic before fitting the door card.
Job done, enjoy a working lock!