Long-range radar sensor, component description - GF30.30-P-3125FLM

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MODEL 212 as of model year 2014 with CODE 23P (Driving Assistance package Plus)

Fig 1: Front Long-Range Radar Sensor

Courtesy of MERCEDES-BENZ USA

Location

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

Task

The long-range radar sensor has the following tasks:

Actuation, power supply and evaluation of target data from the integral long range radar
Transfer of object data for longitudinal vehicle control to the radar sensors control unit (N62/1) (for code (233) DISTRONIC PLUS)
Transfer of object data for traffic monitoring to the radar sensors control unit (with code (237) ACTIVE BLIND SPOT ASSIST)

The control electronics integrated in the 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 long-range radar sensor via the chassis FlexRay (Flex E) to the radar sensors control unit.

Input and output signals

The following input signal are received by the long-range radar sensors and evaluated and the output signals sent via the suspension FlexRay:

Input signals
Output signals

Input signals

Radar request
Diagnosis request

Output signals

Target data from the radar
Diagnostic data

Body

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

Properties of the long range radar:

Detection range of the radar sensor s = 0 to 200 m for a detection angle of ∠ = 18°
Detection range of the radar sensor s = 0 to 60 m for a detection angle of ∠ = 60°
77 GHz radar sensor operating on the pulse Doppler principle for independent measurement of distance and speed

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

Before the long-range radar sensor is the radar plate (a cover transparent to radar in the radiator trim), which is necessary for correct functioning of the long range radar.

Its tasks are as follows:

Shielding against external effects (such as dirt, ice or insects)
Ensuring optimal transmission and reception properties of the radar sensor