1997 MERCEDES-BENZ ML320 automatic transmission

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
Saturday, October 02, 2010 3:15:26 PMPage 38 © 2006 Mitchell Repair Information Company, LLC.

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
Saturday, October 02, 2010 3:15:26 PMPage 39 © 2006 Mitchell Repair Information Company, LLC.

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

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 40 © 2006 Mitchell Repair Information Company, LLC.

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 DesignationModelEngineTransmission
ML 230163.136111.977722.660
ML 270 CDI163.113612.963722.661
ML 320163.154112.942722.662
ML 350163.157112.970722.674
ML 400163.128628.963722.673
ML 400 CDI163.128628.963722.666
ML 430163.172113.942722.663
ML 500163.175113.965722.666
ML 55 AMG163.174113.981722.666
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
Saturday, October 02, 2010 3:15:26 PMPage 41 © 2006 Mitchell Repair Information Company, LLC.

See STARTER LOCK-OUT CONTACT, LOCATION/TASK/DESIGN/FUNCTION.
Torque Converter, Location/Task/Design/Function

See TORQUE CONVERTER, LOCATION/TASK/DESIGN/FUNCTION
.
Wheel Speed Sensor Location/Task/Function

See WHEEL SPEED SENSOR, LOCATION/TASK/FUNCTION
.
Electric Control Module, Location/Task/Design/Function

See ELECTRONIC CONTROL MODULE, LOCATION/TASK/DESIGN/FUNCTION
.
D-4 Shift Isolating Mechanism, Location/Task/Design/Function

See D
-4 SHIFT ISOLATING MECHANISM, LOCATION/TASK/DESIGN/FUNCTION.
Location/Task/Design/Function Of Freewheel

See LOCATION/TASK/DESIGN/FUNCTION OF FREEWHEEL
.
Transmission Range Recognition Switch, Location/Task/Design/Function

See TRANSMISSION RANGE RECOGNITION SWITCH,
LOCATION/TASK/DESIGN/FUNCTION.
Kickdown Switch, Location/Task/Design/Function

See KICKDOWN SWITCH, LOCATION/TASK/DESIGN/FUNCTION MODEL 163 WITHOUT
TOUCH SHIFT.
Location/Task/Design/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Multiple-Disc Brake, Location/Task/Design/Function

See MULTIPLE
-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION.
Multi-Plate Clutch, Location/Task/Design/Function

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 42 © 2006 Mitchell Repair Information Company, LLC.

Floor Shift, Location/Task/Design/Function

See FLOOR SHIFT, LOCATION/TASK/DESIGN/FUNCTION
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Parking Lock, Location/Task/Design/Function

See PARK PAWL, LOCATION/TASK/DESIGN/FUNCTION
.
Planetary Gear Set, Location/Task/Design/Function

See PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION
.
Position Sensor, Location/Task/Function

See POSITION SENSOR, LOCATION/TASK/FUNCTION
.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

See LOCATION/TASK/DESIGN/FUNCTION OF PWM SOLENOID VALVE, TORQUE
CONVERTER LOCKUP CLUTCH.
Modulating Pressure Regulating Solenoid Valve, Location/Task/Design/Function

See MODULATING PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Shift Pressure Regulating Solenoid Valve, Location/Task/Design/Function

See SHIFT PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Working Pressure Regulating Valve, Location/Task/Function

See WORKING PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Regulating Valve Pressure Regulating Valve

See REGULATING VALVE PRESSURE REGULATING VALVE,
LOCATION/TASK/FUNCTION.
Shift Pressure Regulating Valve, Location/Task/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 43 © 2006 Mitchell Repair Information Company, LLC.

Shift Valve Pressure Regulating Valve, Location/Task/Function

See SHIFT VALVE PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Lubrication Pressure Regulating Valve, Location/Task/Function

See LUBRICATION PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function

See TORQUE CONVERTER LOCKUP CLUTCH REGULATING VALVE,
LOCATION/TASK/FUNCTION.
Location/Task/Design Function Of R/P Lock

See R/P LOCK, LOCATION/TASK/DESIGN/FUNCTION
.
Reverse Lamp Switch, Location/Task/Function

See REVERSE LAMP SWITCH, LOCATION/TASK/FUNCTION
.
Shift Detent Mechanism, Location/Task/Design/Function

See SHIFT DETENT MECHANISM, LOCATION/TASK/DESIGN/FUNCTION
.
Holding Pressure Shift Valve, Location/Task/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Shift Valve, Location/Task/Function

SeeSHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Float, Location/Design/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
ETC Control Module, Location/Task

See ETC CONTROL UNIT, LOCATION/TASK
.
Temperature Sensor, Location/Task/Design/Function


2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 44 © 2006 Mitchell Repair Information Company, LLC.

See TEMPERATURE SENSOR, LOCATION/TASK/DESIGN/FUNCTION.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Torque Converter Lock-Up Clutch, Location/Task/Design/Function

See TORQUE CONVERTER LOCK
-UP CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Automatic Transmission, Contents, Function Description

See AUTOMATIC TRANSMISSION, CONTENTS, FUNCTION DESCRIPTION
.
D-4 Shift Isolating Mechanism, Location/Task/Design/Function
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
Saturday, October 02, 2010 3:15:26 PMPage 45 © 2006 Mitchell Repair Information Company, LLC.