34 52 516 Removing and installing/replacing DSC control unit (version 2)

WARNING: This page is about a different variant/trim than selected.

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

Necessary preliminary tasks

Remove See 3451525 REMOVING AND INSTALLING/REPLACING HYDRAULIC UNIT FOR ASC+T or 3451527 Removing and installing/replacing hydraulic unit for DSC

IMPORTANT: Removing pump motor from valve block is not permitted!

Seal line connections with plugs (1) from control unit repair kit.

Clean control unit.

Fig 1: Identifying Plugs

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Release screws (1).

IMPORTANT: Control unit must not come into contact with dirt or moisture.

Carefully pull off control unit (2) without tilting.

Fig 2: Pulling Off Control Unit

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Installation:

Replace screws.

Tighten in diagonal sequence in increments of 1 Nm

Tightening torque 34 51 7AZ .

IMPORTANT: Do not touch plug-in contacts (1) and sealing surface (2) with your fingers.
The seal for the electronic control unit deforms during fitting and thereby achieves its maximum sealing effect.
The control unit must therefore not be removed again after installation or used a second time!
In the event of visible damage, the hydraulic control unit is can no longer be used!

Fig 3: Identifying Plug-In Contacts And Sealing Surface

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Clean sealing surface (2) of hydraulic control unit with fluff-free cloth (do not use hard or sharp objects).

Carry out programming/coding.

Mix-up check of brake lines.

Adjustment/calibration of steering angle sensor.