Mercedes-Benz ML320. Service manual - part 144

 

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Mercedes-Benz ML320. Service manual - part 144

 

 

Operation  

The steering lock interlock prevents the ignition key being removed when the parking lock is not engaged. 

The locking pawl (39) is positioned on the exterior contour of the detent plate (38) if the parking lock is not 
engaged and if the brake pedal is not depressed. See Fig. 20

The cables (53, 54) hold the locking valve (60) in its position in front of the locking cam (61) against the force 
of the pressure spring. Therefore, the ignition key cannot be turned to the "0" position. 

In selector lever position "P" and with the brake pedal in the rest position, the force of the return spring (57) can 
pull the locking pawl (39) under the stop at the detent plate (38) and the pressure spring (62) simultaneously 
pulls the locking valve (60) away from the locking cam (61). 

The ignition key can now be turned to the "0" position and removed from the ignition. 

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. 

Parking Lock, Location/Task/Design/Function 
 
See PARKING LOCK, LOCATION/TASK/DESIGN/FUNCTION.  

Parking Lock, Location/Task/Design/Function 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 21: Parking Lock 
Courtesy of MERCEDES BENZ OF NORTH AMERICA 

Park Pawl, Location 
 
The park pawl gear (4) and park pawl mechanism (4b) are located in he rear section of the transmission 
housing. See Fig. 21

Park Pawl, Task 
 
In addition to the parking brake, the park pawl provides extra mechanical security against the vehicle 
rolling away. 

Park Pawl, Design 
 
See PARK PAWL, DESIGN

Park Pawl, Function 
 
See PARK PAWL, FUNCTION.  

Park Pawl, Design 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 22: Park Pawl, Design 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 

Structure  

 

2001 Mercedes-Benz ML320 

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

  

me 

 

The parking lock mechanism consists of the parking lock gear (4), the parking lock pawl (43), the cone (42) 
with spring (41) and the guide sleeve (4). See Fig. 22. The parking shift lock is actuated by the locking pawl 
(39) and link rod (37) via the detent plate (38). 

Park Pawl, Function 

See Fig. 22

Operation  

In selector lever position "P", the cone (42) slides between the parking lock pawl (43) and the guide sleeve (40). 
The parking lock pawl (43) is therefore pushed against the parking lock gear (4). If the tooth of the parking lock 
pawl (43) does not engage in a tooth space when the vehicle is stationary, but rather touches a tooth of the 
parking lock gear (4), the cone (42) is pre-tensioned by the spring (41) and positioned ready for operation. If the 
parking lock gear (4) continues to turn, the parking lock pawl (43) engages in the next tooth space. 

To prevent damage due to misuse, the intervals between the tooth gaps are such that the park detent (43) can 
only engage when the vehicle is stationary or crawling at low speed. If the vehicle rolls faster, the shape of the 
teeth prevents the parking lock pawl (43) from engaging. 

AUTOMATIC TRANSMISSION MODEL AND COMPONENT INSTALLATION SURVEY AS-BUILT CONFIGURATION 

Transmission 722.6 In Model 163 

Component survey for automatic transmission. See COMPONENT SURVEY FOR AUTOMATIC 
TRANSMISSION MODEL 163

COMPONENT SURVEY FOR AUTOMATIC TRANSMISSION MODEL 163 

SURVEY OF SYSTEM COMPONENTS, AUTOMATIC TRANSMISSION, LOCATION/TASK/DESIGN/FUNCTION 
(WITHOUT TOUCH SHIFT) 

Starter Lock-Out Contact, Location/Task/Design/Function 
 

Sales Designation

Model

Engine

Transmission

ML 230

163.136

111.977

722.660

ML 270 CDI

163.113

612.963

722.661

ML 320

163.154

112.942

722.662

ML 350

163.157

112.970

722.674

ML 400

163.128

628.963

722.673

ML 400 CDI

163.128

628.963

722.666

ML 430

163.172

113.942

722.663

ML 500

163.175

113.965

722.666

ML 55 AMG

163.174

113.981

722.666

NOTE:

Transmission Without Touch Shift 722.6 In Model 163

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

 

 

 

 

 

 

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