67 31 540 Removing and installing/replacing drive unit for head restraint adjustment (comfort seat)

Necessary preliminary tasks

Disconnect plug connection (1).

Release screw (2).

Tightening torque 67 31 4AZ .

Fig 1: Identifying Plug Connection And Mounting Screws

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Pull shaft (1) in direction of arrow out of shaft receptacle (2).

Installation:

Make sure shaft (1) is correctly seated in receptacle (2).

Release retaining ring (3).

Feed out drive unit for backrest head adjustment (4) and remove.

Fig 2: Removing Backrest Head Adjustment Drive Unit

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Removal and installation only

Do not turn spindle (1) in order not to change measurement A.

Replacement

Adopt measurement A of removed drive unit for backrest head adjustment (2). If necessary, adjust measurement A by turning spindle (1).

INITIALIZE drive unit for backrest head adjustment.

Fig 3: Adjusting Back Rest Head Measurement

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