Page 1241 of 4133
The connection to the wiring harness on the vehicle side and the ETC control module (N15/3) is made via this 
13-pin connector (11) with a bayonet lock. 
With the exception of the solenoid valves, all other electric components are fixed to the conductor tracks. 
Electronic Control Module, Function 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 72 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1242 of 4133
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 73 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1243 of 4133
Fig. 36: Electronic Control Module, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.   
Operation     
Signals from the ETC control module (N15/3) are conve  rted into hydraulic functions in the electric valve  
control unit (Y3/6). The RPM sensors (Y3/6n2, Y3/6n3)  , the starter lockout contact (Y3/6s1) and the  
transmission oil temperature   sensor (Y3/6b1) of the electrical cont rol unit (Y3/6) supply the ETC control  
module (N15/3) with input signals. The solenoid valves   are controlled by the ETC control module (N15/3) and  
trigger the hydraulic functions. See   Fig. 36
. 
Location/Task/Design/Function Of Freewheel 
Fig. 37: Function Of Freewheel  
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.    
Freewheel Location 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI  SSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 74 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1244 of 4133
 
In the front planetary gear set a freewheel (F1, F2) is installed between the front sun gear (V1) and the 
stator shaft (8) and in the rear planetary gearset between the rear sun gear (H1) and the intermediate shaft 
(3). See Fig. 37
. 
Freewheel Task 
 
Optimizes individual gearshifts. Support of the individual elements of a planetary gear set against each 
other or against the transmission housing in one direction of rotation in order to permit torque 
transmission. 
Freewheel Design 
 
The freewheels (F1, F2) consist of an outer race (12), an inner race (13), a number of clamping bodies 
(14) and a clamping body cage (15). 
Freewheel Function 
 
See FREEWHEEL, FUNCTION
.  
Freewheel, Function 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 75 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1245 of 4133
Fig. 38: Freewheel Function  
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI  SSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 76 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1246 of 4133
Operation - If the inner race (13) of the freewheel is locked and the outer race (12) turns in direction "A" , the 
locking elements (14) adopt a diagonal position on account of their special contours, allowing the freewheel 
function. See Fig. 38
. The outer race (12) slides over the locking elements (14) with negligible friction. If the 
rotation of the outer race (12) changes to direction "B", the locking elements (14) stand up and lock the outer 
and inner races (12, 13) together. 
Transmission Housing Breathing, Location/Task 
Fig. 39: Transmission Housing Breather, Location/Task 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 77 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1247 of 4133
Transmission Housing Breather, Location 
 
The inside of the transmission and the breather (72) are connected by a channel which is cast into the 
torque converter casing. See Fig. 39
. 
Transmission Housing Breather, Task 
 
The transmission housing vent compensated the pressure in the transmission housing if temperature-
related volume changes in the transmission oil and air occur.  
Kick-Down Switch, Location/Task/Design 
Fig. 40: Kickdown Switch, Location/Task/Design 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Kick-Down Switch, Position 
 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 78 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1248 of 4133
The kickdown switch (S16/6) is located  in the footwell, integrated into the electric accelerator pedal. See  
Fig. 40
.  
Kick-Down Switch, Task  
  
Influencing the shift program of th  e electronic transmission control.  
Kick-Down Switch, Design  
  
The kickdown switch (S16/6) cons  ists of a spring-tensioned electrical switch contact.  
Location/Task/Function Of Command Valve 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662  
me  
Saturday, October 02, 2010 3:15:26 PMPage 79 © 2006 Mitchell Repair Information Company, LLC.