Removing and Installing Complete Front Axle (With Spring Strut Shock Absorber)

31 10 000 - Removing and installing complete front axle (with spring strut shock absorber)





Warning!
Danger to life!
Secure engine in installation position to prevent it from falling down.

Important!
Observe safety instructions on raising the vehicle 00 .. ... Lifting Vehicle With A Lifting Platform.
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Seal off hydraulic lines with plugs.





Necessary preliminary tasks:
- Secure engine in installation position
- Disconnect battery negative lead Disconnecting and Connecting Battery Negative Lead
- Draw off and dispose off hydraulic fluid from fluid reservoir
- Remove underbody protective plate
- Remove air duct for brake ventilation on both sides
- Remove reinforcement plate Service and Repair
- If necessary, remove steering gear cover on both sides
- Remove universal joint from power steering gear Replacing Universal Joint for Lower Section of Steering Spindle
- Disconnect plug connection on Servotronic converter
- Disconnect plug connection from ride-height sensor
- If necessary, disconnect vacuum line from electrically operated valve to engine mounts at T-piece
- Remove pressure line and if necessary Dynamic Drive pressure line from vane pump
- Disconnect return line from power steering cooler Notes on Hydraulic Line With Quick-Connect Coupling
- Remove and tie back brake caliper on both sides Removing and Installing/Replacing Left or Right Front Brake Caliper
- Remove stabilizer link on both sides from spring strut Removing and Installing/Replacing Push Rod (Stabilizer Link) for Left/Right Stabilizer
- Disconnect pulse generator lead on both sides Replacing One Front Pulse Generator
- Remove spring strut from spring strut dome Removing and Installing Complete Left or Right Spring Strut Shock Absorber





Important!
- Check sensor head and line from pulse generator prior to installation for external damage, replacing if necessary.





Version with Dynamic Drive:
Remove bottom right wheel arch trim Removing and Installing/Replacing Front Bottom Right Wheel Arch Trim.
Remove underbody panelling cover on right.
Release nut (1) for Dynamic Drive pressure line.
Tightening torque 37 14 13AZ Electric Components.
Release nut (2) for Dynamic Drive return line.
Tightening torque 37 14 21AZ Electric Components.
Release nuts (3) for pressure lines to front axle oscillating motor.
Tightening torque 37 14 13AZ Electric Components.





Important!
Guide spring struts with your hand when lowering and raising in order to avoid damaging the wheel arches and side panels.
After lowering, the spring struts must be aligned to the front axle carrier and secured in such a way that the ball joints of the control arms, tension struts and tie rod ends are not damaged.





Support front axle carrier Lowering/Raising Front Axle Carrier, release from engine carrier and carefully lower with spring struts.





After installation:
- Fill and bleed hydraulic system
- Check pipe connections for leaks
- Carry out wheel alignment check if a spring strut with support bearing was or has been installed without centering pin.
- Carry out steering angle sensor adjustment Adjustments
- If necessary, carry out initial Dynamic Drive operation Initial Operation With Test Run of Dynamic Drive