Mercedes-Benz ML320. Manual — part 143

Automatic Transmission, Selector Lever Positions

See AUTOMATIC TRANSMISSION, SELECTOR LEVER POSITIONS.

Automatic Transmission, Gear Ratios

See AUTOMATIC TRANSMISSION, GEAR RATIOS.

Power Transmission, Function

See AUTOMATIC TRANSMISSION, POWER TRANSMISSION, FUNCTION.

Gearshift System, Function

See FUNCTION OF GEAR SHIFT.

Hydropneumatic Transmission Control, Function

See HYDROPNEUMATIC TRANSMISSION CONTROL, FUNCTION.

Shift-Lock, Function

See SHIFT-LOCK FUNCTION.

Park Pawl Interlock, Function

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Fig. 19: Park Pawl Interlock, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Operation

The parking lock interlock prevents unauthorized release of the parking lock.

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

If the parking lock is engaged, the ignition key has been removed and the service brake is not activated, the
locking pawl (39) blocks the detent plate (38). See Fig. 19. The park pawl cannot be released. The park pawl
can only be released by turning the ignition key to position "1" and pressing the brake pedal. Starting from
ignition key position "1" the locking cam (61) in the steering lock releases the control cable (53). When the
brake pedal is depressed, the lock lever (55) and roller (58) are twisted down, the return spring at the brake
pedal (57) is tensionsed and the release lever (56) is released.

The force of the pressure spring (64) is now applied via the cables (53, 54) against the lesser force of the
pressure spring (62) and pulls the locking valve (60) in front of the contour of the locking cam (61). The locking
pawl (39) is simultaneously turned via the link rod and lifts up off the detent plate (38).

The parking lock can now be released.

The design of the parking lock interlock is the same as for the steering lock interlock and it functions with
reciprocal action to the steering lock interlock.

Steering Lock Interlock, Function

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Fig. 20: Steering Lock Interlock, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me