Rear Upper Wishbone Installation Details
6j - Rackmount assembly; 91 - Upper wishbone; 91a - Upper ball joint; 91b - Axle bolts; 111 - Brake Caliper (do not disassemble); L6/3 - Left rear wheel sensor; Arrows - Landing markings of the bolts securing the lever to the side frame beam
Note: All self-locking bolts and nuts must be replaced!
1. The details of the installation of the lower transverse arm of the rear suspension are shown in the illustration, to which all references in the text refer.
2. Remove the rear wheels, remove the spare tire (except for models with the latter fastening on the holder behind the tailgate and models 163.174). If equipped, remove the outer spare wheel carrier.
3. On models 163.174 (ML 55 AMG), remove the wheel arch protection liners.
4. Remove the wheel sensor (L6/3, - in case of left lever).
5. Disconnect the strut assembly (6j) from the side suspension beam (see Section Removal, disassembly and installation of rear struts).
6. Press the upper ball joint (91a) out of the hub assembly.
7. Disconnect the lower wishbone from the subframe (see Section Removal, disassembly and installation of rear struts).
8. Loosen the fastening nuts, having previously marked the installation positions (arrows), remove the axle bolts (91b) and separate the upper arm (91) from the frame beam.
9. Check the condition of the rubber axle bushings and ball joint, replace if necessary (see Sections Removal and installation the lower wishbone, replacing the front axle bushing and Checking the condition of the ball joints of the steering knuckle).
10. Installation is carried out in the reverse order - when installing the levers, the bridge assembly must occupy a strictly horizontal position. Make sure that the landing marks (arrows) applied during dismantling are correctly aligned.