Rear view camera

Reversing camera (all-round vision camera)

TRSVC stands for: Top rear bumper camera.

When manoeuvring with the vehicle, the reversing camera provides the possibility of showing the view to the rear on the display. Several assistance graphics can be faded-in to the video image depending upon the current settings. Additionally, an automatic speed-dependent camera pan can be activated. Depending on the setting in the control centre menu, the camera image is shown as full screen or in the main window (2/3 screen mask).


In the case of vehicles with rear view camera only, this component is being incorporated as a control unit.In this case, the rear view camera is connected to the bus.

Note! Ensure that mandatory connections for optional equipment are in place!

Alongside the already familiar PDC parking and manoeuvring aids and reversing camera, another parking and manoeuvring aid is offered in the form of the bumper camera as well as the exterior mirror camera (= all-round vision camera).

The reversing camera does not replace direct assessment of the traffic situation by the driver!

Brief component description

The following components for the reversing camera are described:

The reversing camera is installed in the bumper above the number-plate carrier.

In the same way as the two bumper cameras, the rear view camera makes its signals available to the TRSVC control unit via an LVDS data line. The signals are forwarded to the video switch (VSW) (installed depending on the variant) and subsequently to the Car Information Computer (CIC) over CVBS lines. The CIC transmits the image data via an APIX data cable to the central information display. The image data are displayed on the Central Information Display.

Item Explanation Item Explanation
1 Rear view camera 2 5-pin plug connection for reversing camera


Centre console operating facility

The reversing camera is activated by a button in the centre console operating facility. Switch-on conditions and switch-off conditions see Owner's Handbook.

The reversing camera can also be switched on by using the control centre.

Item Explanation Item Explanation
1 Centre console operating facility 2 10‐pin plug connection
3 Parking assistance button 4 Button for bumper camera
5 Driver experience switch with ECO PRO mode 6 Button DSC OFF

The centre console operating facility has only one plug connection (10-pole). The buttons on the centre console operating facility are still only connected to the Integrated Chassis Management.

TRSVC: Control unit for reversing camera

The all-round vision camera control unit is located in the rear left of the luggage compartment. The light points, light colours and light intensities picked up by the reversing camera are evaluated by the all-round vision camera control unit. The reversing camera is connected to the all-round vision camera control unit by a 5-pin line. The all-round vision camera control unit is connected to the body CAN. The TRSVC control unit is supplied by the rear power distribution box via terminal 15N.

Item Explanation Item Explanation
1 All-round vision camera control unit (TRSVC) 2 5‐pin plug connection
3 10-pin plug connection

System functions

The following system functions are described for the reversing camera:
  • Functional networking
  • Personalisation
  • Assistance graphics

Functional networking

A complex system network with distributed functions in other control units is necessary for implementation of the all-round vision camera. The following graphic shows the system network.

Item Explanation Item Explanation
1 Central information display 2 Front Electronic Module (FEM)
3 Rear Electronic Module (REM) 4 Parking manoeuvring assistant (PMA)
5 Power distribution box, rear 6 Rear view camera
7 All-round vision camera control unit 8 Park assist button in the center console operating facility
9 Integrated chassis management (ICM) 10 Headunit basic version (HU-B)


The following settings can be personalised:

  • Full screen display format ON or OFF
  • Maximum curve radii for the turning circle ON or OFF
  • Lane track ON or OFF
  • Distance graphic ON or OFF
  • Camera pan ON or OFF

Assistance graphics

Various assistance graphics in the form of overlays (graphics and text) can be overlaid in the image of the camera. The assistance graphics can be enabled or disabled in the menu of the rear view camera.

  • Maximum curve radii for the turning circle:

    These radii map the maximum turning circle in the camera image.

  • Marker lines for the lane:

    The lane is dependent of the steering wheel angle. The marker lines show the projected lane of the vehicle and therefore the room required for manoeuvring.

  • Distance graphic:

    When the parking aid (PDC: Park Distance Control) identifies an obstacle a distance graphic is faded into the real image. The graphic changes colour according to the distance to the obstacle. The colour gradient goes from red to green.

  • Virtual camera pan:

    The vertical angle of view of the camera can be changed with the aid of the camera pan. The camera image pans virtually without mechanical movement of the camera. Different angles of view are displayed in the vertical direction and shown as full screen dependent on the driving speed. The bottom angle of view (from the bumper up to the horizontal line) is displayed for slow reversing (below 5 km/h) to allow identification of all possible details behind the vehicle. The angle of view changes upwards for faster reversing (above 5 km/h) (this means: above 1 metre of bumper ground clearance up to at least 10° above the horizontal line).

  • Trailer tow hitch zoom:

    The trailer tow hitch zoom is a zoomed display of the rear end. User-friendly hitching is made possible with the aid of faded in distance graphics (interactive assistance lines dependent on the steering angle as well as marker lines for the distance).

Notes for Service department

General notes

The reversing camera switches off the image buildup when it is not active.

Diagnosis instructions

Note! Follow the instructions for service functions!

The diagnosis system provides the following service functions for the reversing camera:

  • Calibration and teaching in for all-round vision camera

Path: Service functions > driver assistance > all-round vision camera

Depending on the vehicle equipment, all installed cameras are automatically learned in with this service function and the cameras can then be calibrated individually. The bumper camera cannot be calibrated.

Note! Automatic calibration!

An automatic calibration is available for the reversing camera. After replacement, it is necessary to learn in the reversing camera again. The service function provides an automatic calibration. Manual calibration using the special tool is no longer required.

Switch-on and switch-off conditions

The reversing camera is switched on in the following conditions:

  • Pressing the park assist button (after terminal 15 on)
  • Reverse gear engaged (reversing camera switched on automatically)

The reversing camera is switched off under the following conditions:

  • Pressing the park assist button
  • After driving approx. 10 meters (forward)
  • After exceeding a driving speed of approx. 15 km/h
  • Over control centre (can also be permanently deactivated)


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