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Home >> Mercedes Benz >> 2008 >> CL550 >> Repair and Diagnosis >> Drivelines & Axles >> Driveshaft & Universal Joints >> Propeller Shaft -- Cl550 -- 216 Chassis >> Testing & Repair >> Correcting rear articulation angle at rear axle center assembly - AR41.10-P-0086-05SX

Correcting rear articulation angle at rear axle center assembly - AR41.10-P-0086-05SX

Correct the rear inclination angle (∠3) 

Appropriate adjustment bushes for inclination angle correction at the rear axle differential are available as a replacement part.

Adjusting bushes are available with an eccentric hole graduation of 0.5 to 2.5 mm. 1 mm corresponds to a change in articulation angle of approx. 0.15°. The dimension of eccentricity is identified by the notches on the adjustment bushes. The notch points up or down depending on the required correction.

The table listed below provides information as to how the articulation angle determined changes when an adjusting bush without notch is fitted and this is then replaced by an adjusting bush with 1, 2 or 3 notches.

  1. 1 notch= 0.5 mm corresponds to approx. 0.08° 
  2. 2 notches= 1.5 mm equivalent to approx. 0.23° 
  3. 3 notches= 2.5 mm equivalent to approx. 0.38° 

Adjusting bushes with bore for bolt with insertion direction from front to rear.

Fig 1: Identifying Adjusting Bush With Notches 1, 2 Or 3
G07320930Courtesy of MERCEDES-BENZ USA

Adjusting bushes with thread for bolt with insertion direction from the rear to the front.

Fig 2: Identifying Bushes With Thread For Bolt With Insertion Direction From Rear To Front
G07320931Courtesy of MERCEDES-BENZ USA
EXAMPLE, INITIAL MEASUREMENT WITH ADJUSTMENT BUSH WITHOUT NOTCH INSTALLED

1 notch points upwards Determined articulation angle enlarges by + approx. 0.08°
2 notches face upwards calculated inclination angle + approx. 0.23°
3 notches point upwards Determined articulation angle + approx. 0.38°
1 notch points downwards calculated inclination angle decreases by approx. - 0.08°
2 notches point downwards calculated inclination angle - approx. 0.23°
3 notches point downwards Determined articulation angle - approx. 0.38°

On vehicles with bolt insertion direction from front to rear (adjusting bush with bore) 

  1. Support rear axle differential (50) with transmission jack and transmission platform.
  2. Unscrew nut (64c) of rear differential mount.
  3. Pull out bolt (64b) of rear differential mount slightly.
  4. Mark installation position of adjusting bush (64d) (notch).
    Fig 3: Identifying Rear Axle Differential, Nut, Bolt And Adjusting Bush
    G07320932Courtesy of MERCEDES-BENZ USA
  5. Pull out adjustment bush (64d) and remove together with bolt (64b).
  6. Depending on the correction, insert appropriate adjustment bush (64d) together with bolt (64b).
  7. Screw on and tighten nut (64c) TORQUE SPECIFICATION .
  8. Remove transmission jack and transmission platform.

On vehicles with bolt insertion direction from the rear to the front (adjusting bush with bore) 

  1. Support rear axle differential (50) with transmission jack and transmission platform.
  2. Loosen bolt (64b) of rear differential mount.
  3. Mark installation position of adjusting bush (64d) (notch).
  4. Press out the adjusting bush (64d) by continuing to turn the bolt (64b).
    Fig 4: Identifying Rear Axle Differential, Bolt And Adjusting Bush
    G07320933Courtesy of MERCEDES-BENZ USA
  5. Remove adjusting bush (64d).

    IMPORTANT The bolt (64b) can only be removed by lowering the rear axle.

  6. Insert the corresponding adjusting bush (64d) depending on the correction.
  7. Pull in adjusting bush (64d) with bolt (64b) and tighten TORQUE SPECIFICATION .
  8. Remove transmission jack and transmission platform.
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