Component Description For Bumper Radar Sensors - GF30.30-P-3302GN

MODEL 166 as of model year 2016 with CODE 22P (Lane tracking package) 

MODEL 166 as of model year 2016 with CODE 23P (Driving Assistance package Plus) 

MODEL 292 with CODE 22P (Lane tracking package) 

MODEL 292 with CODE 23P (Driving Assistance package Plus) 

Shown on bumper at the front (inner view) (except code P31 (AMG Sport Package Exterior)) 

MODEL 166 as of model year 2016 with CODE 22P (Lane tracking package) with CODE P31 (AMG Exterior Sports package)

MODEL 166 as of model year 2016 with CODE 23P (Driving Assistance package Plus) with CODE P31 (AMG Exterior Sports package)

MODEL 292 with CODE 22P (Lane tracking package) with CODE P31 (AMG Exterior Sports package)

MODEL 292 with CODE 23P (Driving Assistance package Plus) with CODE P31 (AMG Exterior Sports package)

For vehicles with code P31 (AMG Sport Package Exterior) the radar sensors are mounted displaced slightly upwards.

Shown on rear bumper (internal view) 

Location 

Front:

The front bumper radar sensors are inserted into the inner side at the left and right respectively into the front bumper.

Rear:

The sensors of the left outer rear bumper radar sensor, right outer rear bumper radar sensor, integrated left outer rear bumper radar sensor and integrated right outer rear bumper radar sensor are inserted from the inside into the rear bumper on the corresponding side. The center rear bumper radar sensor is inserted centrally on the inside into the rear bumper.

Task 

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

• Left front bumper radar sensor
• Right front bumper radar sensor
• Left outer rear bumper radar sensor
• Left outer rear bumper integrated radar sensor
• Right outer rear bumper radar sensor
• Right outer rear bumper integrated radar sensor

The center rear bumper radar sensor recognizes objects (vehicles in rear) up to s = 80 m (mid-range area) for a maximum detection angle of ∠ = 18°.

Body 

Front and rear bumper radar sensor (short range sensor), except center rear bumper radar sensor:

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
• Detection angle: ∠ = 80° with angle measurement and ∠ = 130° only detection (tracking)
• Carrier frequency: f = 25 GHz
• Method of operation: Short pulse method with f = 1.4 GHz band width (frequency band width f = 24.25 to 25.65 GHz)

The coding (differentiation) for the individual radar sensors takes place by means of appropriate assignment with circuit 31 on pin 5 and 6. 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.

Center rear bumper radar sensor:

The center rear bumper radar sensor operates based on the pulse Doppler principle with the following properties:

• Radar sensor detection range: s = 0.18 to 80 m at a resolution of s = 0.5 m (in the short-range area: s = 0.18 to 30 m at a resolution of s = 0.04 m)
• Detection angle: ∠ = 18° ± 8° (in the short-range area: ∠ = 80° with angle measurement and=130° detection only (tracking))
• Carrier frequency: f = 25 GHz

The sensors of the integrated right outer rear bumper radar sensor and integrated left outer rear bumper radar sensor operate based on the master/slave principle. The master or slave function can be determined via the connector coding. The master function is defined for the integrated right rear bumper radar sensor. That means that the integrated left rear bumper radar sensor sends information via chassis CAN 1 (CAN E1) to the integrated right rear bumper radar sensor, which then evaluates the corresponding information from the two sensors and sends corresponding requests or data via chassis CAN 1 to the corresponding control units.

The left front bumper radar sensor, right front bumper radar sensor, left outer rear bumper radar sensor, right outer rear bumper radar sensor and center rear bumper radar sensor are actuated and evaluated by the radar sensors control unit (N62/1). The signal transmission of the radar sensors to the radar sensors control unit is via the following CAN connections:

• Radar CAN 1 (CAN S1) 
• Radar CAN 2 (CAN S2) 

Radar CAN 1 

The radar sensors control units communicates with the following radar sensors via radar CAN 1:

• Left front bumper radar sensor
• Right front bumper radar sensor

Radar CAN 2 

The radar sensors control units communicates with the following radar sensors via radar CAN 2:

• Left outer rear bumper radar sensor
• Right outer rear bumper radar sensor
• Center rear bumper radar sensor