Component description for bumper radar sensors - GF30.30-P-3302CE

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

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

Shown on a disassembled bumper at the front (internal view) 

Fig 1: Identifying Bumper Radar Sensors Components Location

Courtesy of MERCEDES-BENZ USA

Shown on a disassembled bumper at the rear (internal view) 

Fig 2: Identifying Bumper Radar Sensors Components Location

Courtesy of MERCEDES-BENZ USA

Location 

Front:

The DISTRONIC (DTR) sensors are inserted from the rear at the left and right respectively into the front bumper.

rear:

The radar sensors are respectively inserted on the inside on the left and right outer side for the rear bumper.

Task 

The radar sensor (short range sensor) recognize objects (e.g. vehicles) in the short range area up to s = 30 m for a maximum detection angle of ∠ = 130°.

Design 

The radar sensors are ultra wideband radar sensors with the following properties:

• Radar sensor detection range s = 0.18 to 30 m, at a resolution of s = 0.04 m
• Acquisition angle ∠. = 60° with angle determination and ∠ = 130° only detection (track)
• Radar sensor with f = 24.125 GHz carrier frequency
• Method of operation: short pulse method with f = 5 GHz band width

The high band width of the radar sensors allows a very precise position statement to be made and optimizes separation of objects lying close to each other.

Coding (differentiation) for the individual radar sensors takes place by means of appropriate assignment with ground on pin 5 and 6.

Function 

Actuation and evaluation of radar sensors takes place from the video and radar sensor system control unit (N62/2) via the sensor CAN (CAN S).

Wiring diagram for the video and radar sensor system control unit

PE30.30-P-2103-97FAA