Active Distance Assist Distronic Controller Unit, Component Description - GF30.30-S-3223A

Model 447 

With Code ET4 (Active Distance Assist DISTRONIC) 

With Code XM7 (MOPF II) 

Courtesy of MERCEDES-BENZ USA

Active Distance Assist DISTRONIC controller unit, Shown On Model 447.8 

The numbers on the pins indicate the pin numbering of the slots.

Active Distance Assist DISTRONIC controller unit, Shown On Model 447.8 

The numbers on the pins indicate the pin numbering of the slots.

Overview 

This document contains information on:

• General 
• Function 
  • Reading in of sensors and signals 
  • Evaluation of input parameters 
  • Controlling functions 
  • Output of signals 

General 

The electric controller unit for Active Distance Assist DISTRONIC (B92/1) is located behind the star on the radiator shell.

Function 

The electric controller unit for Active Distance Assist DISTRONIC (B92/1) is the evaluation and arithmetic unit for the mid- and long-range radar.

This results in the following tasks for the electric controller unit for Active Distance Assist DISTRONIC (B92/1):

• Reading in of sensors and signals 
• Evaluation of input parameters 
• Controlling functions 
• Output of signals 

Reading in of sensors and signals 

The electric controller unit for Active Distance Assist DISTRONIC (B92/1) receives, among other things, the following information via suspension FlexRay (Flex E):

• Vehicle speed, from Electronic Stability Program (ESP) control unit (N30/4)
• Wheel speed and wheel rotation direction, from Electronic Stability Program (ESP) control unit (N30/4)
• Acceleration/yaw rate, from Electronic Stability Program (ESP) control unit (N30/4)
• Steering wheel angle of the steering wheel angle sensor, from steering column tube module (MRM) control unit (N80)
• Accelerator pedal position, from ME control unit (N3/34) (with engine 254) or CDI control unit (N3/40) (with engine 654)
• Brake pedal position of the brake light switch (S9/3), from Electronic Stability Program (ESP) control unit (N30/4)
• Position of combination switch (S4), from steering column tube module (MRM) control unit (N80)
• Driver request via menu settings in the instrument cluster (A1) via user interface CAN 2 (CAN HMI2) (model 447.6/7)
• Driver request via menu settings in the instrument cluster control unit (N133/1) via user interface CAN 2 (CAN HMI2) (model 447.8)

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input parameters 

The input parameters are evaluated by the integrated microprocessors and the corresponding components are actuated.

Controlling functions 

The electric controller unit for Active Distance Assist DISTRONIC (B92/1) controls the following functions (depending on the equipment):

• DISTRONIC (with code ET4 (Active Distance Assist DISTRONIC))

Output of signals 

The electric controller unit for Active Distance Assist DISTRONIC (B92/1) transmits, among other things, the following signals via suspension FlexRay (Flex E):

• Requests to output visual and acoustic warning messages via the user interface CAN 2 (CAN HMI2) to the instrument cluster (A1) (model 447.6/7)
• Requests to output visual and acoustic warning messages via the user interface CAN 2 (CAN HMI2) to the instrument cluster control unit (N133/1) (model 447.8)
• Radar requirements of the long range radar (vehicle/operation-specific data
• Request to increase the braking torque
• Request to deduce the braking torque
• Diagnosis request

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).