The side mirror of Focus 3 can be removed very easily because it only holds on diagonal latches. You will need a medium flat-blade screwdriver.
First, you need to turn the mirror to the outside (left-left, right-right) and remove the outside linings neatly with its screwdriver in the area of the turning turn. You have to be careful not to scratch the paint. Next, you need to pull the mirror a little bit and snap the latches. The mirror can be removed without removing the filler, but it is likely that the latch will be broken.
