There are 2 levers.
Mondeo central locking not working on one door.
So you pull the door card inside door covering and look at both locks the inside pull its it working.
The central locking module in the drivers door is very common to fail on mondeos.
Hi this sounds like the fuse has blown for the central locking due to a hi amp draw from a fault lock depending on the country that you are in you will need to find the fuse for the central locking for european cars the fuse will be 57 or 72 it will be a 15amp fuse that will nead to be changed to a yellow 20 amp fuse once the blown fuse is replaced insert the romote key in its slot and turn the ignition on then remove the key open and close the drivers door and the central.
If that fails the latch is busted.
One can cycle this latch lever inside the door shell.
Its a pig of a job to do.
One inside and one outside.
Then look at the key lock cylinder.
Is it connected still and last are both connected to the latch mechanism.