Mercedes-Benz ML320. Manual - part 208

position "P" by simultaneously operating the lock lever.

Location/Task/Design/Function Of R/P Lock 
 
See LOCATION/TASK/DESIGN/FUNCTION OF R/P LOCK. 

Parking Lock, Location/Task/Design/Function 
 
See PARK PAWL, LOCATION/TASK/DESIGN/FUNCTION.  

Function Of Torque Converter Lockup Clutch Control 

Operation 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 165: Function Of Torque Converter Lockup Clutch Control 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

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

  

me 

 

The aim of using the torque converter lockup clutch is to reduce the fuel consumption and exhaust gas 
emissions of the vehicle by reducing torque converter slip. See Fig. 165. This stands in contradiction to the ride 
comfort demands made on the drive train with regard to its vibration behavior. The task of the electronic 
transmission control is therefore to close to the clutch in all driving situations relevant to fuel consumption, if 
possible, and ensure that the engine vibrations are isolated from the drive train. 

The characteristic curves shown in the diagram illustrate the different operating states of the torque converter 
lockup clutch in relation to the accelerator pedal position and transmission output speed, plotted for one 
transmission gear. 

In addition to the evaluation of these characteristics, the status of the torque converter lockup clutch is also 
determined by other variables. 

Variables influencing the states of the torque converter lockup clutch:  



Accelerator Pedal Movement  



Uphill And Down Hill Gradients  



Transmission Shift Functions  



ATF Temperature  



Durability Requirements  



Load Condition  



Engine Control Influences  

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

REMOVE/INSTALL TRANSFER CASE 

Remove/Install 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 166: Removing & Installing Transfer Case 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 

1.1 - Remove noise encapsulation. See REMOVE/INSTALL NOISE ENCAPSULATION. 

2 - Unscrew exhaust bracket (9) and exhaust bracket (10) to exhaust. See Fig. 166.  

3 - Unscrew bolts (14) and remove propeller shaft (13) from transfer case. 

4 - Unscrew bolts (12) and remove propeller shaft (11) from transfer case. 

NOTE:

Model 163.113/128 
Only remove rear section of noise encapsulation.

NOTE:

Hang up propeller shaft to one side and ensure that the universal joint and 
center bearing are not damaged. 
Self-locking screw for front propeller shaft on transfer case (rear axle 
side). See Torque Specifications; Driveshaft.

 

2001 Mercedes-Benz ML320 

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

  

me