Specs Cars

How to Install Rear Wheel Bearings in a Mercedes

1. Park your car on a flat, level surface. Jack your car up and put it securely on jack stands.
2. Remove the wheel and the hub by placing a screwdriver on the edge of the hub. Use a hammer and hit the hub out toward you.
3. Use an Allen wrench to loosen the retaining nut.
4. Remove two bolts that are 21 mm in size. The bolts hold the caliper on the steering knuckle. To remove the bolts use an impact wrench or 18-inch spanner. Make sure you get the right bolts. There are two others that are the same size that hold on the steering mechanism. You want to remove the bolts that hold the caliper.
5. Compress the brake pads to remove the caliper. When removing the caliper, do not kink the brake line. Hang the brake line with a coat hanger or string. Do not let the caliper dangle on the brake line.
6. Remove the outer bearing.
7. Remove the grease seal with a screw driver and hammer. Pry it out and remove the inner seal. The grease seal is destroyed during removal, so remember to use a new seal after you have replaced the inner bearing.
8. Clean out all the grease.
9. Put a new inner bearing in and put a little more grease around the bearing.
10. Put a new grease seal in place and tap down evenly. You may have to hit it hard. Use a 2-by-4 to get even force.
11. Put the outer bearing in place.
12. Put the retaining nut on the hub, and tighten it until the wheel wont turn at all. Once the wheel does not turn, loosen the nut 1/3rd of a turn. Tighten the Allen bolt to secure the nut. Make sure the wheel turns freely, but does not have any play, meaning the wheel does not wobble.
13. Clean all grease out of the wheel hub.
14. On the hub, there is a place to fill with grease. Fill it with grease to the line, but be precise and do not overfill it.
15. Replace the hub and the wheel.
16. Torque the wheel nuts to 50 foot pounds.