61 31 009 Repairing steering column switch cluster (SZL)

WARNING: Move wheels into straight-ahead position and do not alter this position during the repair work.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Note on ordering:

IMPORTANT: Extreme cleanliness is required!

NOTE: Installation is described separately.

Removal:

Unlock retaining lugs on upper housing section (1) with a suitable tool.
Remove upper housing section.

Fig 1: Locating Retaining Lugs On Upper Housing Section
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Release screws (1) in optical element (2).

IMPORTANT: Touch only the optical element.

NOTE: After removal, render optical element unusable and dispose of it in the appropriate manner.

Fig 2: Identifying Optical Element Screws

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Unclip encoded disc (1) from rear of steering column switch cluster with plastic tube (2) supplied for the purpose.

In this process, hold encoded disc by inserting two fingers in the hole.

Fig 3: Removing Encoded Disc From Steering Column Switch Cluster

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To prevent damage, tilt encoded disc (1) away from the printed circuit board when removing.

Fig 4: Tilting Encoded Disc Away From Printed Circuit Board

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IMPORTANT: It is not permissible to clean the bearing points.

IMPORTANT: Make sure that encoded disc, optical element and printed circuit board do not come into contact with grease.

Apply grease supplied for the purpose to friction face (1) of bearing race of front of steering column switch cluster.

Fig 5: Identifying Friction Face Of Bearing Race

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Installation:

IMPORTANT: Thoroughly clean your hands before installation.
Before installing the new parts, put on gloves and hair net included in the repair kit!

IMPORTANT: Not permitted!

Do not touch encoded disc (1) with your fingers!
Do not touch printed circuit board (2)!
Do not apply pressure to encoded disc (3)!
Do not touch sides of encoded disc (4)!

Fig 6: Precautions For Installing New Parts
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Hold encoded disc (1) by inserting two fingers in the hole.
Position encoded disc centered in fixture and clip it in.
Turn encoded disc to and fro to spread the grease over the friction face

Fig 7: Turning Encoded Disc

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Assembly optical element (1) from individual parts included in the repair kit.

Fig 8: Assembling Optical Element

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Secure optical element (2) with screws (1).
Tightening torque: 0.26 Nm.

Fig 9: Identifying Optical Element Screws
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Clip upper housing section (1) into place.
After inserting coil spring cassette, affix "CDS" label close to part-number label (2).

Installation note:

Make sure retaining lugs are correctly engaged.

Fig 10: Locating Area For CDS Label Next To Part-Number Label

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Installation note:

Mark (1) and mark (2) must point to each other.

Fig 11: Identifying Alignment Marks

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