Not off hand. But you can pick aasorted o rings up cheap enough.
No shouldn't think so.
Battery in fob dead.
Door latch/boot latch
Comfort control module (I think that runs central locking on mk4)
Problem is you question yourself, well I do.
Youll kick yourself, if its crank sensor.
Yeh question myself all the time, especially as I have done any work on cars for years, used to have vauxhals as they were easy to fix/upgrade.
Drivers door works fine on fob, so battery is 99% rules out I think.... the thing that is puzzling me most is, it unlocks fine with key (2 turns) and button on drivers door, so, does this mean there are 3 circuits on the locking modules, 1 for key, 1 for key fob and 1 for button in car, if so this seems a bit silly and over complicated, if not, then why is it working with 2 out of the 3?