2. Screw the brake disc to the hub with the wheel bolt (43a), by inserting it into the hole opposite the set bolt (9k).
3. Carefully pry the brake pads away from the brake disc using a screwdriver.
4. Remove hub cap (9e) with a puller (023) or knock it down with a rubber mallet.
5. Check the gap by pulling and pressing the flange with your hands. Rotate the hub a little before each attempt.
6. In workshops, the axial clearance is measured using a device that has a clock indicator of small displacements as a sensor. The sensor is installed with a measuring rod recess of 2 mm. The specified value for the correct gap is 0.01–0.02 mm.
Attention! During a single measurement, by moving the flange back and forth along the axis, the hub cannot be rotated.
7. Loosen hex socket bolt (9i).
8. Screw in the split nut while rotating the hub until it can no longer be turned. Then loosen the nut 1/3 of a turn and hit the axle with a plastic hammer (5a) loosen the tension. Measure the clearance.
9. Re-adjust the gap if necessary. Mercedes prescribes the setting of the gap using a dial indicator. However, in practice (when there is no indicator) the gap is considered correct if the washer under the split nut can be moved back and forth with a screwdriver with some effort. If the washer cannot be moved, press or loosen the split nut.
10. Tighten the hexagon socket bolt on the slotted nut to 8 Nm and check the bearing clearance again.
11. Hub cap to flange edge (arrow) fill with high-temperature bearing grease in an amount of approximately 15 g.
12. Replace the hub cap with special tool 025 or tap it with a rubber mallet.
Attention! Be sure to replace the beaten cap, because moisture penetrates into the bearing through leaks in the joint, as a result of which it quickly collapses.
13. Unscrew the wheel bolt on the brake disc.
14. Put on the wheel, observing the previously painted marking of its previous position. Screw on the wheel. Lower the vehicle onto the wheels and cross tighten the wheel bolts to 110 Nm.
15. Depress the brake pedal repeatedly to bring the brake pads into position.