Page 1329 of 4133
Fig. 93: Float, Function 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Function - With low oil levels, the lubrication oil which flows constantly out of the gearset, flows back to the 
oil gallery (A) through the opening (46). If the oil level rises, the oil presses the float (45) against the housing. 
See Fig. 93
. 
The float (45) therefore separate the oil gallery (A) from the gearset chamber (B). The lubricating oil which 
continues to flow out of the gearsets is thrown against the housing wall, incorporated by the rotating parts and 
flows back into the oil 
gallery (A) through the upper opening (arrow).
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1330 of 4133
ETC Control Unit, Location/Task 
Fig. 94: ETC Control Unit, Location/Task 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
ETC Control Unit, Location 
 
See ETC CONTROL UNIT, LOCATION
. 
ETC Control Unit, Task 
 
See ETC CONTROL UNIT, TASK (EXCEPT CODE (428A) STEERING WHEEL SWITCH 
BUTTONS).  
ETC Control Unit, Location 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1331 of 4133
Fig. 95: ETC Control Module, Location 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Location - The ETC control module (N15/3) is installed in the left footwell, on the heater/air conditioning 
housing. See Fig. 95
. 
ETC Control Unit, Task 
Transmission 722.6 in model 163 with touch shift
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1332 of 4133
Fig. 96: ETC Control Module, Task With Touch Shift  
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI  SSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1333 of 4133

Task - The ETC control module (N15/3) determines the instantaneous operating condition of the vehicle and 
controls all gearshift sequences taking into account the ease of shifting and the driving situation. This involves 
receiving, converting and transmitting various digital and analog signals. See Fig. 96
. 
It receives operating data in the form of input signals from:  
Starter Lock-Out Contact (Y3/6S1)  
RPM Sensor 2 (Y3/6N2)  
RPM Sensor 3 (Y3/6n3)  
Transmission Oil Temperature Sensor (Y3/6B1)  
In addition there is a connection via the engine compartment bus to the:  
Instrument Cluster (A1)  
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9)  
The solenoid valves for the modulating and shift pressure and for the gear changes are actuated by the ETC 
control module (N15/3). 
The pressure required is calculated from all input signals, adjusted to the torque to be transferred. The following 
information from other systems is then processed. 
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9):  
Engine Torque  
Engine Speed  
Accelerator Pedal Position  
Gear Shift  
Engine Status  
Electronic Selector Lever Module Control Module (N15/5):  
Kickdown Switch (S16/6)  
Selector Lever Position P/N  
Traction System Control Module (N47):  
Transmission Ratio  
Speeds  
Instrument Cluster (A1):  
Selector Lever Position/Shift Range  
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1334 of 4133
ETC Control Unit, Task (Without Touch Shift) 
Transmission 722.6 in Model  163 Without Touch Shift  
Fig. 97: ETC Control Module without Touch Shift
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI  SSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1335 of 4133

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Task - The ETC control module (N15/3) determines the instantaneous operating condition for the vehicle and 
controls all gearshift sequences taking into account the ease of shifting and the driving situation. See Fig. 97
. 
This involves receiving , converting and transmitting various digital and analog signals. 
Input signals:  
Starter Lock-Out Contact (Y3/6S1)  
RPM Sensor 2 (Y3/6N2)  
RPM Sensor 3 (Y3/6N3)  
Transmission Oil Temperature Sensor (Y3/6B1)  
Kickdown Switch (S16/6)  
Gear Recognition Switch (S16/10)  
Output signals:  
Reverse/parking lock valve  
Input and output signals:  
Datalink connector (X11/4)  
In addition there is a connection via the engine compartment bus to the:  
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9)  
Traction System Control Module (N47)  
Transfer Case Control Module (N78)  
The solenoid valves for the modulating and shift pressure and for the gear changes are actuated by the ETC 
control module (N15/3). The pressure required is calculated from all input signals, adjusted to the torque to be 
transferred. 
The following information from other systems is then processed:  
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9)  
(Y66/1)  
Selector lever position P/N to the engine control module (ME-SFI) (N3/10) (only on detection of the 
selector lever position "P" or "N" on the transmission range recognition switch (S16/10) and at the starter 
interlock contact (Y3/6s1)).  
Traction system control module (N47):  
Wheel speeds  
 
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1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1336 of 4133
Gear shift  
Traction status  
Transfer case control module (N78):  
Position of transfer case (off-road or on-road ratio)  
Engine torque  
Engine speed  
Accelerator pedal position  
Gear soft  
Engine status  
The following information is output to other systems: 
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9):  
Kickdown switch (S16/6)  
Engage drive mode  
Traction system control module (N47):  
Transmission ratio  
Speeds  
Electronic Selector Lever Module Control Module, Location/Task/Design (With Touch Shift) 
 
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