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

Remove VOLUTE SPRING CASSETTE
Spread antistatic mat
Use antistatic wrist trap with connecting line

Note on ordering:

Workshop equipment
Workshop equipment catalogue
Order number 61 31 9 141 875

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 Steering Column 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 Steering Column Optical Element And Screws

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Fig 3: Removing Encoded Disc From Rear Steering Column Switch Cluster

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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 4: Securing Encoded Disc

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

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 Bearing Race Friction Face

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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!

Fig 6: Caution - Do Not Touch Encoded Disc

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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)!

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: Holding Encoded Disc

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Fig 8: Assembling Optical Element

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

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

Fig 9: Identifying Steering Column Optical Element And 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 Part-Number Label

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Installation note:

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

Fig 11: Identifying Clip Housing Section Marks

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Carry out STEERING ANGLE SENSOR ADJUSTMENT .

Carry out VEHICLE PROGRAMMING/ENCODING .