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61 31... Remount operating unit of the additional seat function (screwed version)

Necessary preliminary tasks: 

Removal: 

Release all screws by means of screwdriver (1) on the operating unit (2).

Fig 1: Releasing Screws On Operating Unit
G09928779Courtesy of BMW OF NORTH AMERICA, INC.

Remove the rear panel (1) and feed out the printed circuit board (2).

Fig 2: Removing Rear Panel And Printed Circuit Board
G09928780Courtesy of BMW OF NORTH AMERICA, INC.

Take out the pressure pin (1) from the operating unit (2).

Fig 3: Removing Pressure Pin From Operating Unit
G09928781Courtesy of BMW OF NORTH AMERICA, INC.

Unclip button (2) with the help of screwdriver (1) and remove.

Fig 4: Removing Button With Screwdriver
G09928782Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Add the button (1) to the operating unit (2) and lock using pressure.

Fig 5: Installing Button To Operating Unit And Lock Using Pressure
G09928783Courtesy of BMW OF NORTH AMERICA, INC.

Add pressure pin (1) to the operating unit (2).

Fig 6: Installing Pressure Pin To Operating Unit
G09928784Courtesy of BMW OF NORTH AMERICA, INC.

Add the printed circuit board (2) and then the rear panel (2) to the operating unit.

Fig 7: Removing Rear Panel And Printed Circuit Board
G09928780Courtesy of BMW OF NORTH AMERICA, INC.

Tighten all screws on the operating unit (2) with the help of screwdriver (1).

IMPORTANT: Pay attention to the freedom of movement and function of the remounted button!
Fig 8: Releasing Screws On Operating Unit
G09928779Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: