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Transmission overload protection, function - GF07.61-P-4026AMG

ENGINE 156.980 in MODEL 164, 251 up to Model Year 8 

ENGINE 156.982 in MODEL 209 

ENGINE 156.983 in MODEL 211, 219 

ENGINE 156.984 in MODEL 216, 221 up to Model Year 8 

Fig 1: Identifying Transmission Overload Protection CAN Communication Diagram
G07304003Courtesy of MERCEDES-BENZ USA

The transmission overload protection protects shift elements of the automatic transmission from excessive thermal stress during load changes in the upper engine speed range.

By briefly retarding the ignition timing and closing the throttle valve during shift operations, the engine torque is reduced.

To do this the ME-SFI [ME] control unit receives a signal via the CAN data bus from the electric controller unit (VGS).

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