Transfer case control unit, component description - GF28.19-P-3200GZ

MODEL 164.1 with CODE (430) Offroad package up to Model Year 8 

MODEL 164.8 with CODE (430) Offroad package up to Model Year 8 

Location 

Fig 1: Identifying Transfer Case Control Unit

Courtesy of MERCEDES-BENZ USA

Task 

The transfer case control unit monitors and shifts the transfer case according to:

• Vehicle speed
• Engine torque
• Cornering recognition
• Tire tolerances

The following control functions are performed by the transfer case control unit:

• Pre-control of the locking torque
• Slip-dependent lock control/slip control
• Lock actuation under braking, ABS/ESP control
• Lock overload protection

The following basic functions are performed by the transfer case control unit:

• Computation of engine torque
• Computation of vehicle reference speed
• Cornering recognition
• Tire tolerance recognition
• Flash programming
• Diagnosis
• Run-on
• Variant coding
• Calibration run