Short And Long-Range Radar Sensor, Component Description - GF30.30-P-3126FG

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: Short And Long-Range Radar Sensor Component Location - Model 213 Up To Model Year 2021 With Code(s) 23P & P20

Courtesy of MERCEDES-BENZ USA

Location 

The front near and long-range radar sensor is located in the center, in front of the radiator.

Task 

The near and long-range radar sensor has the following tasks:

• Actuation, power supply and evaluation of target data from the integral long range radar
• Transmission of object data for longitudinal directional vehicle control to the Intelligent Drive control unit (N62/4)
• Transmission of object data for longitudinal directional vehicle control to the Intelligent Drive control unit
• Transmission of object data to the Intelligent Drive control unit for plausibility checking of the object data from the MFK stereo (A40/13)
• Transmission of object data for collision-avoiding intervention by the brake system to the Intelligent Drive control unit

The control electronics integrated in the near and long-range radar sensor actuate the long range radar and evaluate the target data. The object data from the long range radar are transferred from the front near and long-range radar sensor via the chassis FlexRay (Flex E) to the Intelligent Drive control unit.

This results in the following tasks for the near and the long-range radar sensor:

• Reading in input factors 
• Evaluation of input factors 
• Actuation of assembly parts 
• Transmission of initial parameters 

Reading in input factors 

The near and long-range radar sensor transmits and receives the following input signals via the chassis FlexRay:

• Radar request
• Diagnosis request

Evaluation of input factors 

Input factors are evaluated by the integrated control electronics.

Actuation of assembly parts 

The near and long-range radar sensor actuates the near and long-range radar sensor heating (R61/1) over a direct line (pulse width modulated).

Transmission of initial parameters 

The near and long-range radar sensor transmits and receives the following input signals via the chassis FlexRay:

• Target data from the radar
• Diagnostic data

Body 

The near and long range radar sensor contains control electronics for actuating and evaluating the long range radar.

Properties of the near and long range radar sensor:

• Detection range of the near and long range radar sensor:
  • Detection angle near range: a = 90°
  • Detection angle long range: a = 30°
  • Detection range: up to 30 m for a detection angle of 30°
  • Detection range: 30 up to 100 m for a detection angle of 20°
  • Detection range: 100 up to 200 m for a detection angle of 12°
• Carrier frequency: 77 GHz (in accordance with the "Pulse Doppler Principle" for independent measurement of distance and speed)

The near and long-range radar sensor must be readjusted using the integrated "Service Adjustment Mode" after replacement (e.g. after an accident repair).