Component Description For Multifunction Camera - GF54.21-P-3300FG

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 513 (Road sign recognition system)

Model 213 up to model year 2021 with code P20 (Driving assistant package Plus)

Model 213 up to model year 2021 with code P35 (Light Package)

Fig 1: Mono Multifunction Camera Component Location - Model 213 Up To Model Year 2021 With Code(s) 22P, 513 Or P35 (Except Codes 23P & P20)

Courtesy of MERCEDES-BENZ USA

Fig 2: Stereo Multifunction Camera Component Location - Model 213 Up To Model Year 2021 With Code(s) 23P Or P20

Courtesy of MERCEDES-BENZ USA

Location

The mono multifunction camera and the stereo multifunction camera is positioned under a panel at the top center of the windshield.

Task

Mono multifunction camera:

The mono multifunction camera records information on the surroundings in the area to the front of the vehicle, e.g. ambient brightness, objects or traffic signs. These are evaluated by the integrated control unit, and used for implementing various functions.

Stereo multifunction camera:

The stereo multifunction camera consists of two high-resolution camera heads that are mounted at a distance of approx. 20 cm apart in a housing. While the mono multifunction camera only estimates the distances to objects, the stereo multifunction camera can measure the distance to an object and its height above the road. This is made possible by the differences in perspective between the left and the right optical path. The electronic evaluation circuit in the stereo multifunction camera uses the same effect that enables people to have stereoscopic vision, this refers to the parallax or displacement between two images. At an average distance of 20 to 30 m the stereo multifunction camera can determine the exact distance to the object down to 20 to 30 cm. This high resolution is also available under more difficult conditions such as when multiple objects are situated very close to each other, when objects are partially concealed or when there is a low contrast between the object and the background. The electronic analysis system of the stereo multifunction camera is also able to differentiate between shadow and road markings and real objects. As well as the spatial position of a detected object, the stereo multifunction camera also supplies additional critical information: A direction of motion along the horizontal, vertical and longitudinal axis can be determined for each pixel of a detected object. This then clearly shows whether an object is moving and if so, where to. In combination with object classification (e.g. pedestrian) based on common features, it is possible to achieve a high degree of decision-making reliability. For example, the exact impact location for a collision can be calculated which in turn enables the time remaining until the point of impact to be used to maximum effect for safety precautions. The stereo multifunction camera supports this process over the entire vehicle speed range.

This results in the following tasks:

Reading in of signals
Evaluation of input factors
Controlling functions
Actuation of components
Transmission of signals and requests

Reading in of signals

The input factors are read in via the following connection:

Periphery CAN (CAN PER) (mono multifunction camera)
Chassis FlexRay (Flex E) (Stereo multifunction camera)

Periphery CAN (mono multifunction camera)

The mono multifunction camera also reads in the following signals over the periphery CAN:

Circuit 15 status
Engine running or drive train operational
Wheel speed
Vehicle speed
Vehicle lateral and longitudinal acceleration
Information indicative of driver activity, such as turn signaling, accelerating, braking, steering
Information indicating possible distraction of the driver, such as operation of the audio system, various comfort functions (interior illumination, steering column adjustment) and various menu levels in the instrument cluster (A1) and in the head unit (A26/17)

Chassis FlexRay (Stereo multifunction camera)

The stereo multifunction camera also reads in the following signals over the chassis FlexRay:

Circuit 15 status
Engine running or drive train operational
Wheel speed
Vehicle speed
Vehicle lateral and longitudinal acceleration
Information on brake control system activities
Information indicative of driver activity, such as turn signaling, accelerating, braking, steering
Information indicating possible distraction of the driver, such as operation of the audio system, various comfort functions (interior illumination, steering column adjustment) and various menu levels in the instrument cluster and in the head unit

Evaluation of input factors

The input factors are evaluated by the microprocessor and the corresponding components are actuated.

Controlling functions

The mono multifunction camera controls the following functions:

Lane Keeping Assist (with code 243 (Lane Keeping Assist))
Traffic Sign Assist (with CODE 513 (Traffic Sign Assist))
High beams assistant (with code P35 (Light package))

The stereo multifunction camera controls the following functions:

Traffic Sign Assist (with CODE 513 (Traffic Sign Assist))
High beams assistant (with code P35 (Light package))
Active driver assistance systems (with code 23P (Driving assistance package Plus) or code P20 (Driving assistance package)):
- Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist))
- Distance Pilot DISTRONIC function (with code 233 (DISTRONIC PLUS))
- Steering Pilot function (with code 266 (DISTRONIC PLUS with Steering Assist and Stop & Go Pilot))
- Evasive Steering Assist, function
- Pedestrian detection with Brake Assist PLUS, cross-traffic (with code 269 (Brake Assist PLUS, cross-traffic (BAS+Q)))
- PRE-SAFE® brake (with code 300 (PRE-SAFE® brake) and code 271 (Autonomous brake intervention/pedestrian protection))

Model 213

up to model year 2021

with code P35 (Light Package)

The respective multifunction camera evaluates light sources in front of the vehicle. In the stereo multifunction camera, evaluation takes place via the right camera head.

Actuation of components

To avoid any fogging in the multifunction camera's field of view the front window is heated in this area by the auxiliary heater heating element (R50). The auxiliary heater heating element is directly actuated by the multifunction camera.

Transmission of signals and requests

The multifunction camera sends status information and requirements over the following connection:

Periphery CAN (mono multifunction camera)
Chassis FlexRay (Stereo multifunction camera) Periphery CAN (mono multifunction camera)

The mono multifunction camera also sends the following signals and requests:

Ambient brightness
Actuate steering wheel vibration motor (M99) (with code 243 (Lane Keeping Assist))
Actuate high beams assistant and perform optical headlamp range adjustment (with code P35 (Light package))
Display traffic sign (with CODE 513 (Traffic Sign Assist)) Chassis FlexRay (Stereo multifunction camera)

The stereo multifunction camera also sends the following signals and requests:

Ambient brightness
Actuate steering wheel vibration motor (with CODE 238 (Active Lane Keeping Assist))
Actuate high beams assistant and perform optical headlamp range adjustment (with code P35 (Light package))
Display traffic sign (with CODE 513 (Traffic Sign Assist))
Lane data
Object data (object size, object type, object direction of motion, distance)

Body

The multifunction camera consists of the following main components:

Camera head (mono multifunction camera)
Left and right camera head (stereo multifunction camera)
Electronic analysis system (control unit)
Auxiliary heater heating element

After replacement of a multifunction camera or the windshield the corresponding multifunction camera has to be recalibrated.

Variants

Mono multifunction camera with horizontal detection angle of 34° (except code 513 (Traffic Sign Assist))
Mono multifunction camera with horizontal detection angle of 46° (with code 513 (Traffic Sign Assist))

	Wiring diagram for mono multifunction camera	Model 213 up to model year 2021 with code 22P (Lane tracking package) Model 213 up to model year 2021 with code 513 (Road sign recognition system) except code 23P (Drive package) Model 213 up to model year 2021 with code P35 (Light Package) except code 23P (Drive package)	PE54.21-P-2129-97DBA
	Wiring diagram for stereo multifunction camera	Model 213 up to model year 2021 with code 23P (Drive package)	PE54.21-P-2129-97DBB