Removing, installing and adjusting control pressure cable with vacuum actuator - RA2703722B115X(27-115)

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.

Operation number of the operation texts and work units or standard texts and flat rates:

27-6820

B. Vehicles with upshift delay (TWC heating)

Fig 1: Control Pressure Cable With Vacuum Actuator Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

NOTE: Phased in as of 07/93, a standardized control pressure cable has been fitted in the body.

The control pressure cable with 2 vacuum actuators in the plastic housing is also used for the transmission which does not need the two vacuum actuators.

The vacuum actuator with selector program (7) should be sealed with a blind plug (5) to prevent contamination. The vent connection is to provided with a cap (6).

Fig 2: Identifying Vacuum Actuator With Selector Program And Vacuum Actuator Upshift Delay

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Removing and installing (with upshift delay)

Turn locking plate (arrow) upwards.
Swing control pressure cable with vacuum actuator away from transmission housing and disconnect.
Perform basic setting: Transfer distances "a" and "b" from old control pressure cable to new cable.
1. Distance "a": Measure and adjust position of adjusting screw (11).
2. Apply > 400 mbar vacuum to vacuum actuator (7).
3. Compress control pressure cable and then extend again.
4. Distance "b": Measure position of slide (2) and adjust at adjusting screw (10).
  
  Fig 3: Locating Locking Plate
  Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fit cap (12).

Risk of water penetration!
Pull out valve (2) using a hook until it engages in the assembly position.
Hook control pressure cable with vacuum element into transmission and install. Ensure that it is correctly engaged!

Fig 4: Identifying Vacuum To Vacuum Actuator
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Checking upshift delay

Connect the two vacuum lines to upshift delay switchover valve (Y3/3). Upshift delay is activated.
Check on a road test in selector lever position "D" and low throttle. For adjustment values, see SHIFT POINTS IN SELECTOR LEVER POSITION "D" .
NOTE:
- Turn adjusting screw (11) clockwise : shift point at lower speed.
- Turn adjusting screw (11) anti-clockwise : shift point at higher speed.