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

MODEL 216.3, 221.0 /1 up to 31.8.10 with CODE (234) Blind Spot Assist as of model year 2009 / YoM 08

MODEL 216.3 with CODE (233) Distronic Plus as of model year 2011 with CODE (237) Active Blind Spot Assist as of model year 2011 /YoM 10 facelift

MODEL 221.0 /1 (except 221.095 /195) with CODE (233) Distronic Plus as of model year 2011 with CODE (237) Active Blind Spot Assist as of model year 2011 /YoM 10

MODEL 221.095 /195 with CODE (234) Blind Spot Assist as of model year 2010

As of 1.9.10 for code (233) DISTRONIC PLUS or code (237) Active Blind Spot Assist, shown on model 221

Fig 1: Identifying Left And Right Inner Radar Sensor (Front Bumper)

Courtesy of MERCEDES-BENZ USA

Up to 31.8.09 for code (234) Blind Spot Assist, shown on model 221

Fig 2: Identifying Left And Right Inner Radar Sensor (Rear Bumper)

Courtesy of MERCEDES-BENZ USA

As of 1.9.09 for code (234) Blind Spot Assist or code (237) Active Blind Spot Assist, shown on model 221

Fig 3: Identifying Left And Right Outer Radar Sensor (Rear Bumper)

Courtesy of MERCEDES-BENZ USA

Location

The radar sensors are fitted from the rear in the bumper.

Task

The radar sensors (short range sensors) recognize objects (e. g. vehicles) within a short range up to s = 30 m and at an angle up to ∠= 140°.

Design

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

Radar sensor detection range s = 0.2 to 30 m, at a resolution of s = 0.04 m
Reception area ∠ = 80° with angle determination and ∠= 140° 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 design of the radar sensor as wideband radar sensors allows very precise position data, objects lying close together are detected differentiated.

Function

Vehicles with code (233) Distronic Plus

Actuation and evaluation of the front radar sensors takes place takes up to 31.8.10 from radar sensors control unit (SGR) (N62/1) via sensor CAN (CAN S). As of 1.9.10 the front radar sensors from video and radar sensor system control unit (N62/2) are actuated and evaluated via the sensor CAN.

Vehicles with code (234) Blind Spot Assist

Actuation and evaluation of the rear radar sensors takes place by the radar sensors control unit via the sensor CAN.

For vehicles with code (237) Active Blind Spot Assist actuation and evaluation of the radar sensors at the front and rear takes place by the video and radar sensor system control unit via a sensor CAN.