power mirrors

Hi first time posting here. Please be gentle! My partner has a beetle. 2014 diesel hard top. It failed its controle technique (equivalent of MoT) due to the foglights being out of action (both of the back lights, so I assume a fuse) and the passenger side mirror not being able to fold...

I have read a bunch on the mirrors, mine don't move, I replaced the switch, checked fuse, ... I pulled the mirror glass off and it's seems the motor mechanism is very stiff. I sprayed it with wd40 and it got stiffer? Do these mirrors have a history of this. I'm a new beetle owner? 2000 GLS...