General work on vehicles with ADS - RA32001290600X(32-0600)

1. Releasing pressure from hydraulic system 

   Special tools 

   Fig 1: Identifying Special Tools (116 589 00 17 00 32)

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
   Fig 2: Identifying Special Tools (129 589 00 03 00 32)

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
   Fig 3: Identifying Special Tools (126 589 12 63 00 27 32)

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

   

   In order to avoid accidents, before starting work in which the pressure lines on the level control units or the spring elements have to be loosened, the system must be depressurized.

   Spray danger from emerging hydraulic fluid! Refer to "32-0630 Draining and filling pressure oil system ".

   NOTE: Clean dirty line connections before disconnecting.
   Lines and hoses which have been disconnected, as well as the connections on the units, should be closed immediately with plugs!

   Only use funnel with strainer

   126 589 12 63 00 (060) for filling.

   Fig 4: Identifying Funnel With Strainer

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
2. Reactivating steering angle sensor 

   If the battery has been disconnected or the voltage supply to the steering angle sensor (N49) interrupted, the ADS control unit switches to fault. The ADS indicator lamp (A1e27) does not go out.

   The steering-angle sensor must be reactivated: With the engine running, turn the steering wheel from full lock to full lock. The indicator lamp (A1e27) goes out.

   Fig 5: Identifying Level Control Switch

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
3. Notes on test and repair work 

   Model 129 with level control unit 

   Before driving into multi-story car parks, car washes, pits, car lifts as well as on very uneven roads set increased vehicle level on the level control switch (S77).

   Fig 6: Identifying Body Acceleration Sensor

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

All models 

Always remove the body/wheel acceleration sensors (B24, B24/1) before performing any repair work (incl. bodywork) in which heavy impacts (from hammer, etc.) could generate excessive vibration at the sensor.

B24 Body acceleration sensor (located in left front of engine compartment)

Fig 7: Identifying Wheel Acceleration Sensor (Model 129 Version Installed Up To 6/93)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

B24/1 Wheel acceleration sensor on Model 129 Version installed up to 6/93

Fig 8: Identifying Wheel Acceleration Sensor (Model 129 Version Installed Up To 7/93)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Modified acceleration sensors were introduced in 7/93.

Model 129: The wheel acceleration sensor (B24/1) must be installed with the wiring connection toward the front of the vehicle. It must also be attached to the wire for the ABS wheel speed sensor (arrow).

B24/1 Wheel acceleration sensor, Model 129 Version installed since 7/93

Fig 9: Identifying Body Acceleration Pickup (Model 140)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

B24/1 Body acceleration pickup Model 140

Fig 10: Identifying Body Acceleration Pickup (Model 140)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.