34 51 527 Removing and installing/replacing DSC hydraulic unit

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove front left rear WHEEL ARCH PANEL .
Remove left UNDERBODY PANELLING .

After completing repair work:

Bleed BRAKE SYSTEM

IMPORTANT: Do not mix up brake lines.

If necessary, mark before removal.

Observe different versions with different line seizure.

Brake lines must not be bent.

Close off connecting bores with seal plugs.

Press brake pedal down to floor and secure with pedal support.

NOTE: The brake pedal may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank when the brake lines are opened.

Fig 1: Locating Brake Pedal Support

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Cut open cable strap (1).

Replace cable straps.

Remove foam block (2).

Lever out penetration (3) and pull out towards front.

Fig 2: Identifying DSC Hydraulic Unit Foam Block, Cable Strap And Penetration

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IMPORTANT: Do not bend brake lines.

Grip at square head (1) and release brake lines (2).

Tightening torque 34 32 1AZ .

Fig 3: Identifying DSC Hydraulic Unit Square Head And Brake Lines

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Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Fig 4: Identifying DSC Hydraulic Unit Brake Lines

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Disconnect plug connection (1).

Unfasten screws (2).

Installation note:

Tightening torque 34 51 5AZ .

Remove hydraulic unit (3) towards bottom.

Fig 5: Identifying Hydraulic Unit, Plug Connection And Screws

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Replacement:

Unclip brake lines (1) from holder (2).

Fig 6: Identifying DSC Hydraulic Unit Brake Lines And Holder

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Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Unfasten screws (2). Take off holder (3).

Installation note:

Tightening torque 34 51 4AZ .

Fig 7: Identifying DSC Hydraulic Unit Brake Lines, Screws And Holder

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If the control unit is replaced:

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