1 - Brake pads
2 - Protective cover
1. Jack up the front of the car and place it on supports. Remove the corresponding front wheel.
2. Press the brake pads (1) away from the disc.
3. Using a plunger-type dial gauge, measure the amount of play in the wheel bearing. Compare the measurement result with the requirements Specifications.
4. Remove the protective cap (2) of the hub assembly and unlock the outer slotted nut.
5. Bolt the locking key to the hub (717 589 00 31 00), unscrew the outer nut.
6. Remove the lock plate.
7. Loosen the inner slotted nut, then tighten it to an initial torque of 200 Nm.
Note: When tightening the nut, the hub should be rotated at least three times while simultaneously tapping it with a soft-faced hammer (for bearing roller shrinkage).
8. Loosen the inner nut again and tighten it again, completely eliminating the clearance of the pressure plate fit.
9. Loosen the nut again by about 1/8 of a turn, providing a play of about 0.1 mm, then replace the lock plate.
10. After lubricating, tighten the outer nut - the nut should be turned with the grooves towards the lock plate.
11. Measure the amount of play in the wheel bearing, then tighten the outer slotted nut to the required torque and, after packing it with grease, fit the protective cap (2) into place.
12. Press the foot brake pedal several times to seat the pads, then install the wheel.