And step 2 of that is 'Remove door trim' which is here...
Remove door trim
Removing and installing door trim (front)
Special tools and workshop equipment required
t Wedges -T10383-
Removing
– Switch off ignition and remove ignition key.
– Using wedge -T10383/1-, carefully prise loudspeaker trim -1- off door trim along gap -arrow- and detach.
– Remove bolts -1 and 2-.
– Starting in bottom rear corner, use wedge -T10383- to unclip door trim from door. To do so, insert wedge between door trim and door in area of retaining clips.
Position of retaining clips -arrows-
t Vehicles with 3 doors: 8 retaining clips
t Sportback: 7 retaining clips
– Pull door trim -1- approx. 15 mm away from the door all around.
l Do not leave retaining clips in door.
– Disengage door trim from door at top of window slot -arrows- and detach.
– Sportback: In addition, press door trim -1- upwards out of clip -2- in direction of -arrow- at location indicated.
– Carefully unclip Bowden cable -3- from interior door handle -2-.
– Swivel Bowden cable for interior door handle inwards -arrow-.
– Disengage end of cable -1- at interior door handle.
– To unplug electrical connector, press catch -1-, turn retaining bracket in direction of -arrow- and unplug connector.
– Detach door trim.
Installing
– Engage end of cable -1- in lever of interior door handle.
– Clip in Bowden cable -3- for interior door handle at interior door handle -2-.
l Bowden cable must engage audibly.
– Plug in electrical connector at door control unit.
– Position door trim at window slot and press on downwards.
– Carefully position clips -2- for door trim all around door -1- and press door trim onto door -arrows- until it engages audibly at anchorage points → Anchor.
– Sportback: In addition, engage door trim -1- in clip -2- by pressing door trim onto door in direction of -arrows- at location indicated so that it engages audibly.
Perform remaining installation in reverse order of removal.
Notes for installation: tightening torques, renewing components etc. → Chapter „Exploded view - door trim (front)“