Rear level controller - Removal and installation - RA32001290670X(32-0670)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Preceding operations:

Drain hydraulic system (32-0630) .

Operation no. of operation texts and work units or standard texts and flat rates

32-0820

Model 129

Fig 1: Identifying Rear Level Controller Remove/Install Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Pressure lines (PH, S1)	detach, attach at level control unit (3), using line wrench 129 589 00 03 00. M10X1 = 14 Nm. M12X1 = 20 Nm. M12X1.5 =25 Nm.
Return line (TH)	detach, attach at level control unit (3), using line wrench 129 589 00 03 00. M12X1 = 20 Nm. M12X1.5 =25 Nm.
Connecting rod/control rod (55) on level control lever	remove, install at lever on level control unit. Replace self-locking nut, 10 Nm. Note information in No. 3.
Level control unit (3)	remove, install, Replace self-locking hexagon bolts, 10 Nm.
Level-controlled vehicle height at front and rear	check and adjust.
Headlights	check and adjust.

Special tools

Fig 2: Identifying Special Tools (126 589 12 63 00 27 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Special Tools (116 589 00 17 00 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Special Tools (589 00 03 00 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

NOTE: A new fluid drain plug (3p) was introduced at connection "S2" on the level controller (3) in 10/92.

The earlier fluid drain plug at connection "A" was replaced by a threaded seal plug (arrow). Tightening torque for fluid drain plug: 14 Nm.

Fig 5: Identifying Drain Plug And Level Controller

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Removal, installation

Use a line wrench to disconnect pressure lines (PH, S1) and return line (TH) on level control unit (3).
Installation note

Check and adjust ride height as determined by the level control system at both front and rear of vehicle. The headlights will have to be readjusted if the height of the vehicle has changed.

Illustration shows USA version up to 9/92

Fig 6: Identifying Pressure Lines (PH, S1), Return Line (TH) And Level Control Unit
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Tightening torques:

M10X1 = 14 Nm.

M12X1 = 20 Nm.

M12X1.5 =25 Nm.
Remove the linkage (7) or control rod (55) from the lever on the level controller.
Installation note

Replace self-locking nuts, 10 Nm.

Check ball joints on control rod for ease of movement, and protective covers for cracks.

Version installed since 10/92

Fig 7: Identifying Pressure Lines, Linkage And Control Rod
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Unscrew self-locking nut on level control lever to detach the control rod. If required hold pin with an 8 mm open-end wrench. The ball pin must not be able to be pulled out of the ball cup.
Unscrew two hexagon bolts and remove level control unit from bracket.
Installation note

Replace self-locking bolts, 10 Nm.
Install in reverse sequence.

Model 140

Fig 8: Identifying Rear Level Controller Remove/Install Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Pressure lines (P, S1)	disconnect, connect at level control unit (3) using line wrench 129 589 00 03 00. S1 = 14 Nm. P = 20 Nm.
Return line (T)	disconnect, connect at level control unit (3) using line wrench 129 589 00 03 00, 20 Nm.
Linkage (7)	remove and install at lever of level control unit. Replace self-locking bolts, 10 Nm.
Level control unit (3)	remove, install, 10 Nm. Replace self-locking hexagon bolts, 10 Nm.
Vehicle level at both front and rear axles	check, check base setting for level control system.
Headlights	check and adjust.

Special tools

Fig 9: Identifying Special Tools (126 589 12 63 00 27 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 10: Identifying Special Tools (116 589 00 17 00 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

NOTE: Letter codes on level controller

A=Model 140 with level control at the rear

B= Model 140 with rear level control and ADS,

Model 140 with rear level control and ASD.

Fig 11: Identifying Level Controller, Fluid Drain Plug Connection Fitting And Return Line

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Modified fluid drain plug on level controller

.A new fluid drain plug (3m) was installed at connection "S2" on the level controller. The earlier fitting (3m) was deleted at the same time. Tightening torque for fluid drain plug: 14 Nm.

A = Version installed up to 9/92

B = Version from 10/92 onward

Fig 12: Identifying Fluid Drain Plug And Connection Fitting

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Removal, installation

Use a line wrench to disconnect pressure lines (P, S1) and return line (T) at level control unit.
Installation note

Check and adjust ride height as determined by the level control system at both front and rear of vehicle/base setting for level control system. Check and adjust the headlights if the height of the vehicle has changed.

Tightening torques:

S1 = 14 Nm

P and T = 20 Nm.

Fig 13: Identifying Pressure Lines (P, S1) And Return Line
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unscrew two self-locking bolts (arrows) and detach linkage (7).
Installation note

Replace self-locking bolts, 10 Nm.

Fig 14: Identifying Self-Locking Bolts And Linkage
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unscrew two hexagon bolts (arrow) and remove level control unit (3) from bracket.
Installation note

Replace self-locking hexagon bolts, 10 Nm.

Fig 15: Identifying Hexagon Bolts And Level Control Unit
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Install in reverse sequence.