33 52 000 Removing and installing/replacing rear left or right shock absorber
- When replacing shock absorber/spring strut, renew auxiliary damper!
- Read and comply with NOTES ON REPLACING SHOCK ABSORBERS .
Ensure correct mating (absorber/support cup) when replacing shock absorbers.
The following mating combinations (absorber/support cup) are permissible.
| Damper | Support pot |
|---|---|
| A 394.5 mm | B 69.2 mm |
| C 347.5 mm | C 22.0 mm |
Absorber/support cup mating must be identical on left/right sides.
Version with Vertical Dynamics Management:
Installation note:
- All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
- Retaining elements on chassis and suspension and steering parts must be replaced.
Necessary preliminary tasks
- Remove REAR WHEEL .
- Tension both COIL SPRINGS WITH SPECIAL TOOL (and leave on vehicle).
- Version with self-levelling suspension: Deactivate and drain AIR SPRING/SUSPENSION SYSTEM .
- Only E72 and E70 with 3rd row seats:
Remove LASHING RAIL IN LUGGAGE COMPARTMENT .
Version with Vertical Dynamics Management:
Partially detach REAR WHEEL ARCH COVER .
If applicable, disconnect both plug connections (3) and expose lines up to shock absorber.
- Plug connection for brake pad wear sensor.
- Plug connection for pulse sensor.
Release clamp (1) and remove brake hose (2) from shock absorber (4).
Installation note:
When installing the shock absorber, ensure that the holder for the brake hose (2) points to the middle of the vehicle.
Ensure correct fit in guide.
Retainer must be felt and heard to snap into place.
Release screw (3).
Remove shock absorber (4) from swinging arm and tie back.
Screw must not be used as a fitting aid to installing the shock absorber!
Installation note:
Replace screw.
Tighten down screw in NORMAL POSITION .
Tightening torque 33 52 3AZ .
Do not pull expanding clips with luggage compartment well out of lashing rail.
Release expanding clamps (1).
Press luggage compartment well (2) to one side.
Installation note:
Replace damaged expanding clamps.
Unscrew nuts (1).
Installation note:
Replace self-locking nuts.
Tightening torque 33 52 1AZ .
Remove shock absorber if necessary with connecting lines in downward direction.
Installation note:
Clean body contact surface for support bearing flange all round.
Refit sealing washer (1).
Replacement
Modify SUPPORT BEARING .
Modify auxiliary absorber (1) and protective tube (2) incl. support cup.
Installation note:
Replace auxiliary damper (1) and protective tube (2).
After installation
- Activate and fill AIR SPRING SYSTEM .
- Replacement only: Code shock absorber with DIS tester and check software status.
- Replacement only: Carry out VERTICAL ACCELERATION SENSOR ADJUSTMENT .