Component description for multifunction camera - GF54.21-P-3300CA

MODEL 207.3/4 as of model year 2014 with CODE 22P (Lane Tracking package)

MODEL 207.3/4 as of model year 2014 with CODE 23P (Driving Assistance package Plus)

MODEL 207.3/4 as of model year 2014 with CODE 513 (Road sign recognition system)

MODEL 207.3/4 as of model year 2014 with CODE 608 (Adaptive Main Beam Assist)

MODEL 207.3/4 as of model year 2014 with CODE 628 (INTELLIGENT HEADLAMP CONTROL PLUS (IHC+))

MODEL 207.3/4 up to model year 2014 with CODE 238 (Active lane keeping Assist)

MODEL 207.3/4 up to model year 2014 with CODE 476 (Lane Keeping Assist)

MODEL 207.3/4 up to model year 2014 with CODE 513 (Speed Limit Assist)

MODEL 207.3/4 up to model year 2014 with CODE 608 (Adaptive Main Beam Assist)

Multifunction camera (A40/11) (up to 31.5.13 with code (238) Active Lane Keeping Assist or code (476) Lane Keeping Assist or code (513) Speed Limit Assist or code (608) Adaptive Highbeam Assist), shown on model 207.3

Fig 1: Identifying Multifunction Camera - With Code (238), Code, Code (513) And Code, Shown On Model 207.3

Courtesy of MERCEDES-BENZ USA

Multifunction camera (A40/11) (as of 1.6.13 with code (476) Lane Keeping Assist or code (513) Speed Limit Assist or code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+) and without code (23P) Driving Assistance package), shown on model 207.3

Fig 2: Identifying Multifunction Camera - With Code (476), Code (513), Code (608), Code (628) And Without Code (23P), Shown On Model 207.3

Courtesy of MERCEDES-BENZ USA

Stereo multifunction camera (A40/13) (as of 1.6.13 with code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+) or code (513) Speed Limit Assist and code (23P) Driving Assistance package), shown on model 207.3

Fig 3: Identifying Multifunction Camera - With Code (608), Code (628), Code (513) And Code (23P), Shown On Model 207.3

Courtesy of MERCEDES-BENZ USA

Location

The respective multifunction camera is located at the top on the windshield behind a cover.

Task

Multifunction camera:

The multifunction camera records information on the area surrounding 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 mono cameras, that are mounted at a distance apart of approx. 20 centimeters in a housing. While one mono 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 meters the stereo multifunction camera can determine the exact distance to the object down to 20 to 30 centimeters. This high resolution is also available under arduous conditions. When, for example, several objects are located close to each other, when objects are partially overlapped or when the contrast between object and the background is low. The electronic evaluation circuit for the stereo multifunction camera can also differentiate between shadows and the road markings for real objects. Along with the spatial position of a detected object, the stereo multifunction camera also provides decisive additional information: For each pixel of a detected object a moving direction can be determined on the horizontal, vertical and the longitudinal axes (longitudinal axis of an 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 the driver throughout the entire vehicle speed range.

This results in the following tasks:

Reading in of signals
Evaluation of input factors
Controlling functions
Actuation of components
Output of signals

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

Reading in of signals

The input factors are read in via the following connection:

Chassis CAN (CAN E) (up to 31.5.13) or chassis CAN 2 (CAN E2) (as of 1.6.13) (Multifunction camera)
Chassis FlexRay (Flex E) (Stereo multifunction camera)

Chassis CAN (CAN E) (up to 31.5.13) or chassis CAN 2 (CAN E2) (as of 1.6.13) (Multifunction camera)

The multifunction camera reads in, for example, the following signals over the chassis CAN or chassis CAN 2:

Terminal status of terminal 15
Engine running or drive train operational
Wheel speed
Vehicle speed
Vehicle lateral and longitudinal acceleration
Vehicle level (with code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))
Information, that indicates driver activities, e.g. turn signaling, accelerating, braking, steering
Information, that indicate driver distraction, e.g. operation of audio system, carious comfort functions (interior illumination, steering column adjustment) and various menu levels in the instrument cluster (A1)

Chassis FlexRay (Flex E) (Stereo multifunction camera)

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

Terminal status of terminal 15
Engine running or drive train operational
Wheel speed
Vehicle speed
Vehicle lateral and longitudinal acceleration
Vehicle level (with code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))
Accelerator pedal position
Information on Intelligent Light System activities
Information on brake control system activities
Information, that indicates driver activities, e.g. turn signaling, accelerating, braking, steering
Information, that indicate driver distraction, e.g. operation of audio system, carious comfort functions (interior illumination, steering column adjustment) and various menu levels in the instrument cluster

The functions that use these signals are described in the individual function descriptions

Evaluation of input factors

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

Controlling functions

The multifunction camera controls the following functions:

Lane Keeping Assist (with code (476) Lane Keeping Assist)
Speed Limit Assist (with code (513) Speed Limit Assist)
High Beams Assist (with code (608) Adaptive Highbeam Assist or as of 1.6.13 with code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))

The stereo multifunction camera controls the following functions:

Speed Limit Assist (with code (513) Speed Limit Assist)
High Beams Assist (with code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))
Active driver assistance systems:
- Active Lane Keeping Assist (with code (238) Active Lane Keeping Assist)
- BAS PLUS (with code (268) Brake Assist PLUS or code (269) Brake Assist PLUS, cross-traffic (BAS+Q))
- PRE-SAFE brake (with code (300) Collision reduction (CMS))
- DISTRONIC PLUS Steer Assist (with code (266) Steer Assist)

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.

Output of signals

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

Chassis CAN (up to 31.5.13) or chassis CAN 2 (as of 1.6.13) (Multifunction camera)
Chassis FlexRay (Stereo multifunction camera)

Chassis CAN (up to 31.5.13) or chassis CAN 2 (as of 1.6.13) (Multifunction camera)

The multifunction camera sends the following signals and requests, for example over the chassis CAN or chassis CAN 2:

Steering wheel vibration motor (M99)
Ambient brightness
Conduct optical headlamp range adjustment
Actuate adaptive high beams
Display traffic signs

The functions that use these signals are described in the individual function descriptions.

Chassis FlexRay (Stereo multifunction camera)

The stereo multifunction camera sends the following signals and requests over the chassis FlexRay:

Steering wheel vibration motor
Ambient brightness
Conduct optical headlamp range adjustment
Actuate adaptive high beams
Display traffic signs
Lane data
Object data (object size, object type, object direction of motion, distance)

The functions that use these signals are described in the individual function descriptions.

Variants

Multifunction camera as of 1.6.13:

Multifunction camera with horizontal detection angle of ∠= 34° (with code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+) without code (513) Speed Limit Assist)
Multifunction camera with horizontal detection angle of ∠= 46° (with code (513) Speed Limit Assist or code (608) Adaptive Highbeam Assist or code (628) AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))

Wiring diagram for multifunction camera

PE54.21-P-2129-97EAA
PE54.21-P-2129-97EAB