Component description for DISTRONIC electric controller unit - GF30.30-P-3213CE

MODEL 204.0/2 with CODE (233) Distronic Plus with CODE (237) Active Blind Spot Assist with CODE (238) Active Lane Keeping Assist as of model year 2012/YoM 11 facelift 

MODEL 204.3 with CODE (233) Distronic Plus with CODE (237) Active Blind Spot Assist with CODE (238) Active Lane Keeping Assist 

View of radiator grille 

Fig 1: Identifying DISTRONIC Electric Controller Unit

Courtesy of MERCEDES-BENZ USA

Location 

The DISTRONIC controller unit is located in the middle of the radiator.

Task 

The DISTRONIC controller unit fulfills the following tasks:

• Actuation, power supply and evaluation of the target data from the integral long range radar
• Control of the target evaluation (long range radar)
• Passing on of the object data for vehicle longitudinal regulation to the video and radar sensor system control unit (N62/2 (for code (233) DISTRONIC PLUS)
• Transfer of object data for traffic monitoring to the video and radar sensor system control unit (with code (237) Active blind spot assist)

The electronic control circuitry integrated into the DISTRONIC control unit actuates the long range radar and evaluates the target data.

The target data from the long range radar is transferred by the DISTRONIC control unit via the vehicle dynamics CAN (CAN H) to the video and radar sensor system control unit.

Input and output signals 

The following input signals from the DISTRONIC controller unit are received and evaluated and the output signals are issued via the dynamics CAN:

• Input signals
• Output signals

Input signals 

• Radar request
• Diagnosis request

  Output signals 

  • Target data from the radar
  • Diagnostic data

  Design 

  The DISTRONIC control unit contains electronic control circuitry for actuation and evaluation of the long range radar.

  Properties of long range radar:

  • Detection range of the radar sensor s = 0 to 200 m for a detection angle of ∠ = 18°
  • Detection range of the radar sensor s = 0 to 60 m for a detection angle of ∠ = 60°
  • 77 GHz radar sensor operating on the pulse Doppler principle for independent measurement of distance and speed

  The DISTRONIC controller unit must be newly adjusted after exchange (e.g. after an accident repair) using the integrated "service adjustment mode".

  View of radiator grille 

  Fig 2: Identifying Radar Plate

  Courtesy of MERCEDES-BENZ USA

  The radar plate is a radar-permeable cover in the radiator grille, which is required for the Distronic PLUS to function correctly.

  Its tasks are as follows:

  • Shielding against external effects (such as dirt, ice or insects)
  • Ensuring optimal transmission and reception properties of the radar sensor

    Wiring diagram for Distronic (DTR) control unit

    PE30.30-P-2101-97FAA