") OpenWindow.document.write("") OpenWindow.document.close() self.name="main" } // --> Mercedes-Benz M-Class 4ETS 4 ETS 4-ETS system, traction control or traction management



 
How ESP works
mild off-road
wild off-road

stuck in Death Valley

ML ground clearance
M-Class glossary
brake pad wear
ML320 FAQ
ML 320 links


 


 

 

 

 


 

 


Mercedes-Benz M-Class 4ETS system



MB's claim, 4 ETS would stop spinning wheels and
direct all available torque (up to 100%) to the wheel(s) with traction, does not hit the nail on the head.


 Here is how it works:

 
Due to 4 ETS intervention, after a brief moment of traction loss, spinning wheels are slowed down

and the differentials will again distribute a higher amount of torque to all four wheels.

 see detailed description


If only one wheel has traction it receives 25% of the available torque.

75% of the torque is transformed into heat.


If two wheels have traction, they receive 50% of the available torque. 

50% of the torque is transformed into heat.

 
If three wheels have traction, they receive 75% of the available torque. 

25% of the torque is transformed into heat.

more about traction loss and 4ETS

 

 4ETS and ESP have different goals:

4ETS keeps you moving, while ESP keeps you moving in the direction you intended the vehicle to go.

 

  Copyright © 1997-2005 Harald Pietschmann. All rights reserved.