427119 Removing and installing rear spring strut (steel springs)
WM 427119 Removing and installing rear spring strut (steel springs)
Preliminary work
1. Remove wheel. -> 440519 Removing and installing wheel - section on "Removing" Removal and Replacement
2. Remove the relevant side panel of the luggage compartment cover. -> 700619 Removing and installing luggage compartment trim panel (luggage compartment cover) - section on "Removing"
Removing rear spring strut (steel springs)
WARNING
Wheel bearing housing raised incorrectly
- Risk of squashing
- Risk of damage to components
-> Wear personal protective gear.
-> Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).
Information
- Spring strut screws are under tension. Use a suitable lift with rubber base.
- Do not damage the brake cover plate.
Raising rear wheel bearing housing (shown as an example)
Information
- The pictures shown in this document may differ from the original.
- However, this does not affect the validity and relevance of the pictures.
Rear spring strut (steel springs)
1. Remove caps -1- from the top screws on the spring strut at the front, under the side panel of the luggage compartment cover, using a suitable tool.
Removing caps
2. Loosen fastening screws -1- on the upper spring strut, but do not remove them.
Upper spring-strut mount
3. Raise the vehicle.
4. Secure the spring strut using a suitable jack => Raising rear wheel bearing housing (shown as an example).
Raising rear wheel bearing housing (shown as an example)
5. Remove the lower spring strut -1- from the wheel bearing housing -2- and connecting link -4-. To do this, loosen the fastening screw -3-.
Screw securing spring strut and wheel bearing housing
6. Remove the jack and carefully lever the spring strut -1- out of the wheel bearing housing -2- using a suitable tool, e.g. mounting lever.
7. Lower vehicle.
8. A second mechanic is needed to hold and remove the spring strut.
The first mechanic unscrews the top fastening screws -1- on the spring strut completely.
The second mechanic holds the spring strut securely and then pulls it out of the vehicle.
Upper spring-strut mount
Removing rear spring strut (steel springs with PASM)
WARNING
Wheel bearing housing raised incorrectly
- Risk of squashing
- Risk of damage to components
-> Wear personal protective gear.
-> Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).
Information
- Spring strut screws are under tension. Use a suitable lift with rubber base.
- Do not damage the brake cover plate.
Raising rear wheel bearing housing (shown as an example)
Information
- The pictures shown in this document may differ from the original.
- However, this does not affect the validity and relevance of the pictures.
Rear spring strut (steel springs with PASM)
1. Remove caps -1- from the top screws on the spring strut at the front, under the side panel of the luggage compartment cover, using a suitable tool.
Removing caps
2. Loosen fastening screws -1- on the upper spring strut, but do not remove them.
Loosening upper spring strut
3. Raise the vehicle.
4. Release electric plug connection at the upper spring-strut mount -1- ( -a- ) and pull it off -A-.
Plug connection for steel springs
5. Secure the spring strut using a suitable jack => Raising rear wheel bearing housing (shown as an example).
Raising rear wheel bearing housing (shown as an example)
6. Remove the lower spring strut -1- from the wheel bearing housing -2- and connecting link -4-. To do this, loosen the fastening screw -3-.
Screw securing spring strut and wheel bearing housing
7. Remove the jack and carefully lever the spring strut -1- out of the wheel bearing housing -2- using a suitable tool, e.g. mounting lever.
8. Lower the vehicle.
9. A second mechanic is needed to hold and remove the spring strut.
The first mechanic unscrews the top fastening screws -1- on the spring strut completely.
The second mechanic holds the spring strut securely and then pulls it out of the vehicle.
Upper spring-strut mount
Installing rear spring strut (steel springs)
WARNING
Unsecured climbing aid
- Danger of climbing aid falling over
- Danger of persons falling down
-> Secure the climbing aid to prevent it from slipping and tipping over.
Information
- All screws and bolts on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels, or the wheel suspension is raised with a universal vehicle lift. Dimension -X- , from lower edge of wing to centre of axle corresponds to vehicle position. For the current height values, please refer to the adjustment values for suspension alignment -> 4495TW Adjustment values for suspension alignment 4495TW Adjustment values for suspension alignment.
Dimension X - lower edge of wing to centre of axle (shown as an example)
- Visually inspect all parts.
- Replace self-locking nuts.
- Replace all expansion screws (screws fitted using torque angle tightening procedure).
- Use correct tightening torques and torque angle. -> 4X00IN Tightening torques for rear axle 4X00IN Tightening torques for rear axle
A second mechanic is needed for installing the spring strut.
1. Only raise the vehicle as far as required on the lifting platform so that a suitable jack can fit under the wheel bearing housing and a second mechanic can easily reach the luggage compartment floor with a small ladder. => Installing spring strut
2. Carefully fit the spring strut -1- at the upper spring-strut mount.
3. When doing so, make sure that the pins -3- of the rocker bearing -2- fit exactly into the corresponding bore -4- on the body.
Upper spring-strut mount
4. Position the jack -2- as a support under the spring strut -1- and raise it as far as required -A- until the installation position of the spring strut no longer changes.
The rocker bearing must be flush with the body.
Installing spring strut
5. A second mechanic -3- must now climb onto a suitable pedestal -4- , or small ladder and fit and tighten the top screws -1- on the spring strut. Final tightening of the top fastening screws to the specified tightening torque is done in Step 10.
When fitting the screws, make sure that they do not tilt and can be screwed in easily.
Upper spring-strut mount
6. Raise the vehicle.
7. Insert the spring strut into the wheel bearing housing with the help of the jack.
Supporting the spring strut (shown as an example)
8. Fit the lower spring strut -1- with the wheel bearing housing -2- and connecting link -4-.
To do this, insert the fastening screw -3- through the components from behind and fit it.
Screw securing spring strut and wheel bearing housing
9. Lower the vehicle.
10. Then fit the fastening screws -1- for the upper spring strut to the specified tightening torque.
The tightening sequence -A, B, C, D- must be strictly observed!
Installation sequence for upper spring strut screws
11. Secure the caps -1- on the top fastening screws for the spring strut at the front.
Fitting caps
Installing rear spring strut (steel springs with PASM)
WARNING
Unsecured climbing aid
- Danger of climbing aid falling over
- Danger of persons falling down
-> Secure the climbing aid to prevent it from slipping and tipping over.
Information
- All screws and bolts on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels, or the wheel suspension is raised with a universal vehicle lift. Dimension -X- , from lower edge of wing to centre of axle corresponds to vehicle position. For the current height values, please refer to the adjustment values for suspension alignment -> 4495TW Adjustment values for suspension alignment 4495TW Adjustment values for suspension alignment.
Dimension X - lower edge of wing to centre of axle (shown as an example)
- Visually inspect all parts.
- Replace self-locking nuts.
- Replace all expansion screws (screws fitted using torque angle tightening procedure).
- Use correct tightening torques and torque angle. -> 4X00IN Tightening torques for rear axle 4X00IN Tightening torques for rear axle
A second mechanic is needed for installing the spring strut.
1. Only raise the vehicle as far as required on the lifting platform so that a suitable jack can fit under the wheel bearing housing and a second mechanic can easily reach the luggage compartment floor with a small ladder. => Installing spring strut
2. Carefully fit the spring strut -1- at the upper spring-strut mount.
3. When doing so, make sure that the pins -3- of the rocker bearing -2- fit exactly into the corresponding bore -4- on the body.
Upper spring-strut mount
4. Position the jack -2- as a support under the spring strut -1- and raise it as far as required -A- until the installation position of the spring strut no longer changes.
The rocker bearing must be flush with the body.
Installing spring strut
5. A second mechanic -3- must now climb onto a suitable pedestal -4- , or small ladder and fit and tighten the top screws -1- on the spring strut. Final tightening of the top fastening screws to the specified tightening torque is done in Step 11.
When fitting the screws, make sure that they do not tilt and can be fitted easily.
Securing upper spring strut
6. Raise the vehicle.
7. Insert the spring strut into the wheel bearing housing with the help of the jack.
Supporting the spring strut (shown as an example)
8. Fit the lower spring strut -1- with the wheel bearing housing -2- and connecting link -4-.
To do this, insert the fastening screw -3- through the components from behind and fit it.
Screw securing spring strut and wheel bearing housing
9. Plug in electric plug connection -1- for the spring strut at the upper spring-strut mount -A- and lock it -a-.
Plug connection for steel springs
10. Lower the vehicle.
11. Then fit the fastening screws -1- for the upper spring strut to the specified tightening torque.
The tightening sequence -A, B, C, D- must be strictly observed!
Installation sequence for upper spring strut screws
12. Secure the caps -1- on the top fastening screws for the spring strut at the front.
Fitting caps
Subsequent work
1. Fit wheel. -> 440519 Removing and installing wheel - section on "Installing" Removal and Replacement
2. Install side panels of the luggage compartment cover. -> 700619 Removing and installing luggage compartment trim panel (luggage compartment cover) - section on "Installing"