34 51 527 Removing and installing/replacing hydraulic unit for DSC (from production 08/2010)

Necessary preliminary work:

Remove air filter. See REMOVING AND INSTALLING/REPLACING THE INTAKE SILENCER HOUSING (N14, N18) or REMOVING AND INSTALLING THE INTAKE SILENCER HOUSING (N16) .
Read and comply with GENERAL GUIDELINES .

After completing the repair work, BLEED BRAKE SYSTEM .

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

NOTE: The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Fig 1: Pressing Brake Pedal Down To Floor And Securing With Pedal Support

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Remove line holder (1) from bulkhead.

Disconnect plug connection (2).

IMPORTANT: Do not mix up brake lines and if necessary mark prior to removal.
Close off connecting bores with seal plugs.
Brake lines must not be bent.

Unfasten brake lines (3).

Installation note:

Tightening torque 34 32 1AZ .

Fig 2: Identifying Line Holder, Plug Connection And Brake Lines

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Raise vehicle.

Release screws (1) from below.

Installation note:

Tightening torque 34 51 2AZ

Fig 3: Identifying Screws

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Release screw (1).

The clutch hydraulic line can be easily pressed to one side by release the holder.

Release screw (2).

Installation note:

Tightening torque 34 51 2AZ .

First raise hydraulic unit (3) a little and then swing out.

Fig 4: Removing Hydraulic Unit

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Installation note:

Make sure rubber mounts (1) are correctly fitted in bores.

Fig 5: Identifying Rubber Mounts

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Adjustment of steering angle sensor

Brake line mix-up test:

Function check, hydraulic unit

Replacement:

Carry out PROGRAMMING/ENCODING