I have a S Class W220 on a 55 plate. The door module allows for mirrors to be folded in an out but you can’t adjust the mirrors near side and off side is this a fuse problem
If the mirrors don't move at all it could be the motor inside the mirror. it can also be the SAM module. I would check the fuses first. Then remove the glass from the mirrior and use a multi meter to check for power at the motor as you press the mirror switch.