Mercedes-Benz ML320. Service manual - part 210

 

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Mercedes-Benz ML320. Service manual - part 210

 

 

Basically automatic transmission 722.6 with electronic control offers the following advantages: 

Reduced Fuel Consumption  

Improved Shift Comfort  

More Favorable Gear Steps As A Result Of 5 Gears  

Enhanced Life And Reliability  

Reduced Servicing Costs  

The electrohydraulic control unit is bolted onto the bottom of the transmission housing. The end of the 
transmission is formed by an oil pan made of sheet steel. 

The oil pressure for the converter lockup clutch and center multiple-disc clutch is supplied via holes in the input 
shaft. The oil pressure to the rear multiple-disc clutch is routed through the output shaft. The lubricating oil is 
supplied and distributed by additional bore holes in both shafts. All bearing points of the gear sets as well as 
freewheels and shift elements are supplied with lubricating oil. 

The parking lock gear and drive flange are connected to the output shaft by gearing. 

Freewheels F1 and F2 optimize shifting. The front freewheel (F1) rests against the stator shaft extension on the 
transmission side and connects the sun gear of the front planetary gear set to the transmission housing in the 
locking direction. 

The torque converter housing and transmission housing are made of a metal alloy. They are bolted together and 
centered via the outer multiple-disc carrier of the multiple-disc brake B1. A coated intermediate panel seals the 
two components. 

The oil pump and outer multiple-disc carrier of the front multiple-disc brake are bolted to the converter housing.

The mechanical part consists of the propeller shaft, output shaft, a sun gear shaft and three planetary gearsets 
which are coupled together. 

In transmissions for powerful engines, the planetary gearsets have 4 planetary gears, while for less powerful 
engines the front and rear planetary gear system has three planetary gear wheels. The stator shaft is pressed into 
this and is secured against turning by a spline. 

The rear freewheel F2 connects the sun gear of the center planetary gear set to the sun gear of the rear planetary 
gearset in the locking direction. 

The electrohydraulic control unit consists of the shift plate made of light alloy for hydraulic control and an 
electronic control unit. 

The electrical control unit consists of a supporting body made of plastic in which the electrical components are 
combined. The shell is screwed to the shift plate. Conductor tracks which are integrated into the shell, connect 
the electric components to a plug connector. This 13-pin plug connector forms the connection with the vehicle-
side wiring harness and with the ETC 5 (electronic transmission control) control module (N15/5) via a bayonet 
lock. 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

SURVEY OF SYSTEM COMPONENTS, AUTOMATIC TRANSMISSION (AT), LOCATION, TASK, DESIGN

Function Of Gear Change 
 
See FUNCTION OF GEAR CHANGE

Shifting N to D (1st Gear), Function 
 
See SHIFTING N TO D (1ST GEAR), FUNCTION

Shift From 1 to 2, Function 
 
See SHIFT FROM 1 TO 2, FUNCTION

Limp-Home Mode, function 
 
See LIMP-HOME MODE, FUNCTION

Operating Pressure, Function 
 
See OPERATING PRESSURE, FUNCTION

Lubricating Pressure, Function 
 
See LUBRICATING PRESSURE, FUNCTION

Shift Pressure, Function 
 
See SHIFT PRESSURE, FUNCTION

Modulating Pressure, Function 
 
See MODULATING PRESSURE, FUNCTION

Regulating Valve Pressure, Function 
 
See REGULATING VALVE PRESSURE, FUNCTION

Shift Valve Pressure, Function 
 
See SHIFT VALVE PRESSURE, FUNCTION

Manual Drive Mode Selection, Function 
 
See MANUAL DRIVE MODE SELECTION, FUNCTION

Oil Level Control, Function 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 
See OIL LEVEL CONTROL, FUNCTION

Function of Torque Converter Lockup Clutch Control 
 
See FUNCTION OF TORQUE CONVERTER LOCKUP CLUTCH CONTROL

Torque Converter Lockup Clutch Control Pressure, Function 
 
See TORQUE CONVERTER LOCKUP CLUTCH CONTROL PRESSURE, FUNCTION

Function Of Locking Of Selector Lever Position "P" 
 
See FUNCTION OF LOCKING OF SELECTOR LEVER POSITION "P"

Ignition Lock Locking, Function 
 
See IGNITION LOCK INTERLOCK

Function Of Shift Lock Override 
 
See FUNCTION OF SHIFT LOCK OVERRIDE

Survey Of System Components, Automatic Transmission, Location/Task/Design/Function 
 
See SURVEY OF SYSTEM COMPONENTS, AUTOMATIC TRANSMISSION, 
LOCATION/TASK/DESIGN/FUNCTION

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 169: Location Of Mechanical Parts 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

 

 

 

 

 

 

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