Drivers electric wing mirror problem

Hi all ..this is my first post so here goes.
Having just purchased for £2000 a mint condition one owner from new 14000 miles full service history on a 07 plate Micra C+C I just discovered that the drivers side electric wing mirror adjusts up and down but not side to side ...I think I need to take the mirror bit of so I can get to the motor bit and have a look to see what is going on however I cant find any information on how to get to it...Help please.

The car is great by the way and I will post some pics on here asap.