Control Pressure Cable Vacuum Element

NOTE: Not all vehicles are equipped with a control pressure cable vacuum element. Only vehicles with dual shifting modes for transmission may have this option.

Ensure control pressure cable is properly adjusted. See CONTROL PRESSURE CABLE ADJUSTMENT . Raise and support vehicle. Disconnect vacuum hose from control pressure cable vacuum element. See Fig 1 .
Connect a vacuum supply to vacuum element. Pull control pressure cable up to full load stop. Measure how far the piston sticks out of the vacuum element (distance "A"). See Fig 2 . Also, refer to the VACUUM ELEMENT PISTON PROTRUSION table. If vacuum element piston protrusion is not to specification, turn adjustment screw on control pressure cable vacuum element. See Fig 1 .

Fig 1: Connecting Vac. Hose To Control Pressure Cable Vac. Element

Courtesy of MERCEDES-BENZ OF NORTH AMERICA

VACUUM ELEMENT PISTON PROTRUSION

Application

In. (mm)

4-Cyl. Engine

.31 (8)

6-Cyl. Engine

With 722.3 Transmission ⁽¹⁾

.28 (7)

With 722.4 Transmission ⁽¹⁾

.24 (6)

8-Cyl. Engine

.24 (6)

⁽¹⁾	See IDENTIFICATION for transmission application.

Fig 2: Checking Vacuum Element Piston Protrusion

Courtesy of MERCEDES-BENZ OF NORTH AMERICA