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

Model 238 

Up To Model Year 2021 

With Code 234 (Blind Spot Assist) 

Model 238 

Up To Model Year 2021 

With Code 23P (Drive package) 

Shown on model 238.3 

Location 

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.

Tasks 

The following radar sensors (short range sensors) recognize objects (e. g. vehicles) in the short range area:

• Blind Spot Assist:
  • Left outer rear bumper integrated radar sensor
  • Right outer rear bumper integrated radar sensor
• Distance-Pilot DISTRONIC, Steer-Pilot, Active Lane Keeping Assist (with code 23P (Driving Assistance Package)), Active Blind Spot Assist, PRE-SAFE® rear end:
  • Left outer rear bumper radar sensor
  • Right outer rear bumper radar sensor

Structure 

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.

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

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

Actuation and evaluation of the rear outer left bumper radar sensor and the rear outer right bumper radar sensor takes place from the Intelligent Drive control unit. The signal transmission of the radar sensors takes place over the following CAN connections:

• Periphery CAN (CAN PER) 
• Radar CAN 2 (CAN S2) 

Periphery CAN 

The following radar sensors communicate via the periphery CAN:

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

Radar CAN 2 

The radar sensors communicate over the radar CAN 2 with the Intelligent Drive control unit:

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

	Wiring diagram for Mercedes-Benz Intelligent Drive control unit		PE30.30-P-2106-97DCA
	Blind Spot Assist wiring diagram		PE54.71-P-2100-97DCA