Removal and installation the lower arm of the front suspension (Mercedes-Benz E-Class W123)

1. Remove the front suspension shock absorber and spring.

2. Loosen the steering rod end nut and use a puller to disconnect the rod end from the steering knuckle.

3. Loosen the bolt securing the auxiliary tie rod to the body.

4. Fix the position of the lower suspension arm inner eccentric bolt discs relative to the cross member, then unscrew the nut and remove the discs and bolt.

5. Loosen the nut of the lower ball joint of the steering knuckle and use a puller to disconnect the lower suspension arm.

6. Remove the lower suspension arm together with the auxiliary rod.

7. Loosen the mounting bolt and separate the suspension spring support cup from the lower arm.

8. Fix the relative position of the lower arm and auxiliary rod in the mounting unit and separate these parts from each other.

9. Conduct a defect inspection of the parts. If the ball joint is worn, replace the lower suspension arm assembly.

10. To replace the auxiliary traction rollers, remove the caps, rubber gaskets and install new parts in the suspension arm.

11. To replace the inner rubber bushings of the mounting unit, first remove the old bushings, using a drill (hacksaw) to cut them if necessary. Clean the inner diameter, immerse the new rubber bushings in soapy water and press them into the suspension arms with a vice so that their outer flanges are located vertically.

Installation is performed in the reverse order of removal. In this case, the final tightening of the bolts and nuts is performed on the lowered vehicle. Finally, check the front wheel alignment angles.