32 41 435 Removing And Installing/Replacing ARS Return Line In Wheel Arch (N55/N57/N63)

Special tools required:

32 1 270

WARNING: DANGER OF POISONING if oil is ingested/absorbed through the skin!
DANGER OF INJURY if oil comes into contact with eyes and skin!

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Do not draw off hydraulic fluid (risk of contamination).
Close off line connections with seal plug. 32 1 270

Recycling:

Catch and dispose of hydraulic fluid in a suitable collecting vessel.

Necessary preliminary tasks:

Remove front right wheel arch cover . See 51 71 038 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (FRONT SECTION) or 51 71 039 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (REAR SECTION) .
Remove UNDERBODY PROTECTION .
Remove STIFFENING PLATE (F01/F12 all-wheel drive vehicle).
Remove right STEERING ASSEMBLY COVER .
Release front right UNDERBODY PANELLING .

IMPORTANT: Pressure lines must be closed off with suitable seal plugs 32 1 270 immediately after removal!

Release screw (1) for return line.

Fig 1: Screw For Return Line

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Installation note:

NOTE: When tightening the screw connection (1), hold line (2) with pliers (3).

Non-compliance will result in damage to the line (2)!

Tightening torque: 37 13 12AZ .

Fig 2: Connection, Line And Pliers

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Undo holder (1) at front axle support.

Fig 3: Identifying Holder

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Release bolt (1) on line flange, release holder (2) at front axle support and remove return line toward the rear.

Tightening torque: 32 41 19AZ .

Fig 4: Identifying Bolt And Holder

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IMPORTANT: When assembling, make sure that in succession only the seal plugs of the line to be fitted are removed.
When fitting lines, do not tilt connectors (sealing rings!) and connect fully before screwing.
Do not replace sealing rings on hydraulic lines.
Replace affected line if sealing ring is damaged.

After installation:

Fill and bleed HYDRAULIC SYSTEM .
Check pipe connections for leaks.
Carry out START-UP DYNAMIC DRIVE OPERATION .