Contents: Removal ⤓ Installation ⤓
Removal
1. Disconnect the negative cable from the battery.
If your car stereo system is equipped with a security code, make sure you have the correct combination to activate the audio system before disconnecting the battery!
2. Jack up the car and place it on supports.
3. Remove the corresponding rear wheel.
4. On models equipped with ABS, remove the wheel sensor - to avoid sensor failure, try to avoid its electrical contact with metal suspension elements.
5. Remove the rear brake caliper and, without disconnecting the hydraulic line, tie it with wire to the suspension elements, remove the brake disc.
6. Unscrew the bolts securing the axle shaft to the connecting flange, loosen the nuts and remove the washers - to provide access to the self-locking nut, slightly move the end of the axle shaft to the side.
7. Using a special tool such as MB9b11-01, lock the axle shaft, then loosen the self-locking nut.
8. Using a puller with a nozzle (MB9b11-01 and MB9b41-01), release the rear axle journal from the trailing arm assembly.
9. On ABS equipped models, remove the wheel sensor rotor from the trunnion (use a suitable bushing and press).
10. Using a press, remove the outer bearing with the dust cover from the journal.
11. Using a puller, release the oil seal and inner bearing from the trailing arm assembly.
12. Assess the condition of the connecting flange and axle journal. Check the dust cover for signs of deformation and other mechanical damage. Carefully inspect the bearings for signs of overheating. Replace defective components.
Installation
1. Using a suitable mandrel, seat the inner bearing into the trailing arm assembly. Then install the oil seal (bent upwards and until it rests against the shoulders of the inner arm).
Note: You can use a suitable socket head or a piece of pipe of the corresponding diameter as a mandrel for seating the seal. Tap the seal gradually and evenly - use a soft-faced hammer.
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2. Place the dust caps (inner one with the recess facing outward) until they stop on the hangers.
3. Lubricate the inner surface of the sealing lips of the outer bearing seal with universal grease. Place the bearing on the axle journal (with the seal lips facing the connecting flange).
4. Press the wheel sensor mouth into place (with the groove towards the flange).
5. Temporarily install the trunnion onto the trailing arm assembly. Install the coupling flange and screw on a new self-locking nut.
6. While holding the journal from turning using the special tool MB9b11-01, tighten the self-locking nut to the required torque (220 Nm).
7. Install new axle shaft mounting nuts, prepare washers, screw in and tighten the mounting bolts to the required torque (55÷65 Nm).
8. Install the brake disc, caliper and parking brake components (see Chapter Brake system).
9. Install the wheels and lower the vehicle to the ground. Check the parking brake adjustment and make the appropriate adjustment if necessary (see Chapter Brake system).
10. Before operating the vehicle, pump the foot brake pedal until it feels firm when pressed.