I'm not sure what you mean by the "complete door unit". The door switches on the drivers door are in a block. Look at the plastic door moulding that the switches are mounted in and look into the recess that you hold while closing the door when in the car. At the bottom is a speckled piece of rubber. Prise this out with a flat blade screwdriver, then remove the hex bolt(s) underneath it. You should now be able to prise the whole plastic moulding out of the door, complete with switch assembly. (I can't remember which end lifts first, so be careful). You will now be able to remove the switch assembly. There are lots of wires so it might be advisable to take a pic before removing them. I seem to remember that two connectors are the same fitting. Hope that helps!