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

Model 213

up to model year 2021

with code 22P (Lane tracking package)

Model 213

up to model year 2021

with code 23P (Drive package)

Model 213

up to model year 2021

with code P20 (Driving assistant package Plus)

Fig 1: Front Bumper Radar Sensors Components Location - Model 213 Up To Model Year 2021 With Code(s) 22P, 23P Or P20

Courtesy of MERCEDES-BENZ USA

Fig 2: Rear Bumper Radar Sensors Components Location - Model 213 Up To Model Year 2021 With Code(s) 22P, 23P Or P20

Courtesy of MERCEDES-BENZ USA

Location

Front:

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

Rear:

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

Task

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

Left outer front bumper radar sensor
Right outer 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

Body

The front outer left bumper radar sensor, front outer right bumper radar sensor, integrated outer left rear bumper radar sensor and integrated outer right rear bumper radar sensor:

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

Radar sensor detection range 0.18 m to 30 m at a resolution of 0.04 m
Detection angle of 80° with angle measurement and 130° with detection only (tracing)
Carrier frequency: 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.

Outer left rear bumper radar sensor or outer right rear bumper radar sensor:

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° only detection (tracking))
Carrier frequency: 25 GHz

The integrated outer right rear bumper radar sensor and the integrated outer left 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. In other words, the integrated left rear bumper radar sensor sends its information via the periphery CAN to the integrated right rear bumper radar sensor which evaluates the corresponding information from both integrated rear bumper radar sensors and sends corresponding requests or data via periphery CAN to the corresponding control units.

The front left bumper radar sensor, front right bumper radar sensor, outer left rear bumper radar sensor, outer right rear bumper radar sensor and center rear bumper radar sensor are actuated and evaluated by the Intelligent Drive control unit (N62/4). The signal transmission of the radar sensors to the Intelligent Drive control unit is via the following CAN connections:

Periphery CAN (CAN PER)
Radar-CAN front (CAN S1) (with code 292 (PRE-SAFE® pulse side))
Radar-CAN rear (CAN S2)

Periphery CAN

The Intelligent Drive control units communicates with the following radar sensors via the periphery CAN:

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

Radar-CAN front (with code 292 (PRE-SAFE® pulse side))

The Intelligent Drive control units communicates with the following radar sensors via the front radar CAN:

Left outer front bumper radar sensor
Right outer front bumper radar sensor

Rear radar CAN

The Intelligent Drive control units communicates with the following radar sensors via the rear radar CAN:

Left outer rear bumper radar sensor
Right outer rear bumper radar sensor

	Wiring diagram for Intelligent Drive control unit (B92/2, B92/5, B92/7, B92/10)		PE30.30-P-2106-97DBA
	Wiring diagram for Blind Spot Assist (B92/6, B92/11)		PE54.71-P-2100-97DBA