Genuine 1993 Mercedes-Benz 190E Wheel Bearing

1993 Mercedes-Benz 190E Wheel Bearing Parts Q&A

• Q: How to check and adjust the front wheel bearing endfloat on 1993 Mercedes-Benz 190E?

  A: Firmly apply the parking brake, then jack up the front of the vehicle and support it on axle stands before removing the relevant front roadwheel. Using spacers, refit two of the wheel bolts on opposite sides and tighten them securely. Tap the grease cap out from the center of the hub, renewing it if damaged, and remove the radio interference spring from the center of the axle shaft if necessary. Carefully lever the brake pads clear of the disc with a large, flat-bladed screwdriver to prevent interference with the wheel bearing free play. Mount the dial gauge onto the front face of the hub/disc, positioning the gauge probe in contact with the end of the axle shaft, zero the gauge scale, then grasp the disc at two opposite points and pull it in and out, noting the reading obtained and checking that the wheel bearing endfloat is within specified limits. If adjustments are needed, proceed accordingly. If all is well, remove the dial gauge, refit the radio interference spring if fitted, tap the grease cap into position, refit the roadwheel, lower the vehicle, and tighten the wheel bolts to the specified torque. Depress the brake pedal several times until normal, non-assisted pedal pressure returns before taking the vehicle on the road. If adjustments are necessary, first carry out the initial operations, then slacken the wheel bearing retaining nut clamp bolt until the retaining nut is free to turn. Rotate the brake disc and lightly tighten the wheel bearing nut until the disc becomes difficult to turn, then slacken the wheel bearing nut by approximately one-third of a turn and strike the end of the hub spindle with a soft-faced mallet to relieve tension on the bearing. Check the wheel bearing endfloat and adjust as necessary by rotating the wheel bearing nut, then tighten the wheel bearing nut clamp bolt to the specified torque. Recheck the bearing endfloat and refit all disturbed components.