My 2011 Superb Elegance has developed a weird fault with some electrical features, but just on the driver's door:

1. Central locking works on all doors - except the driver's door

2. Left (passenger side) door mirror can be adjusted from door control, but not the driver's door.

3. The driver's door mirror does not heat up or fold in.

I've checked the fuses but they are all OK, but I can't understand how one fuse could be responsible without affecting the other linked electricals.

Does anyone have any ideas regarding this? Thanks in advance.

Broken wires in driver's door bellows.

Super common.

Yep. I'd agree, my 2014 had some issues with the locking, found several broken wires and wires with insulation cracked.

DIY repair if you are comfortable messing about with wires/soldering etc.

I suspect the passenger door and boot lid going the same way unfortunately...age, repeated bending/stretching and material quality all an issue here.