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Home >> Mercedes Benz >> 2012 >> GL350 >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical System - Body - 164 Chassis - 2 Of 8 >> Basic Knowledge >> Cockpit management and data system (COMAND), function >> Cockpit management and data system (COMAND), function - GF82.85-P-0003GZ

Cockpit management and data system (COMAND), function - GF82.85-P-0003GZ

MODEL 164 except CODE (494) USA version except CODE (498) Japan version with CODE (527) COMAND APS (with navigation) up to Model Year 2008 

Fig 1: Identifying Comand Operating, Display And Controller Unit
G10118256Courtesy of MERCEDES-BENZ USA

The COMAND (Cockpit Management and Data System) operating, display and controller unit is a central control and display device for all entertainment and communications systems integrated into the vehicle. It can also be controlled with the buttons on the multifunction steering wheel (MFL).

Fig 2: Identifying Comand Operating, Display And Controller Unit
G10118257Courtesy of MERCEDES-BENZ USA

The COMAND operating, display and controller unit is installed in the center console.

From the COMAND operating, display and control unit, the following system components integrated into the device can be controlled:

The following external components are controlled:

Shown on model 164.1, Left view, without speaker 

Fig 3: Identifying Comand Operating, Display And Controller Unit (Left) - Shown On Model 164.1
G10118258Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Comand Operating, Display And Controller Unit (Right) - Shown On Model 164.1
G10118259Courtesy of MERCEDES-BENZ USA

Shown on model 164.1, Right view, without speaker, production period up to 31.5.06 

Fig 5: Comand Operating, Display And Controller Unit Block Diagram
G10118260Courtesy of MERCEDES-BENZ USA

Block diagram, production period up to 31.5.06 

Fig 6: Identifying Comand Operating, Display And Controller Unit - Shown On Model 164.8
G10118261Courtesy of MERCEDES-BENZ USA

Shown on model 164.8, production period as of 1.6.06 

Continuation of legend for model 164.8, production period as of 1.6.06 

Fig 7: Instrument Cluster Block Diagram
G10118262Courtesy of MERCEDES-BENZ USA

Block diagram, production period as of 1.6.06 

Continuation of legend of block diagram, production period as of 1.6.06 

Function requirements: 

When circuit 15R is active, the functions of the COMAND, operating, display and controller unit are available. If circuit 15R is not active, the MOST subscribers can be activated by switching on the COMAND, operating, display and controller unit.

In this case, control using the multifunction steering wheel is not possible.

Radio reception 

The COMAND operating, display and controller unit actuates 2 integrated radio tuners.

Operation via the interface is generated by the COMAND operating, display and controller unit and displayed on the screen.

The audio signals are processed, amplified and then output over the vehicle speakers by the COMAND operating, display and controller unit.

With code (810) Sound system, the audio signals are routed to the amplifier for sound system, amplified there, and output over the vehicle speakers.

Playing audio CDs 

The single slot drive above the display of the COMAND operating, display and controller unit and the CD changer (Code (819) 6-disk CD changer) are capable of playing CD audio media (in Red Book audio format) and data CDs with MP3 files (max. 99 tracks).

Both disk drives can process text information, which is stored on a CD. Located below the display is the button for ejecting the CD ("Disc Eject").

Audio signal control 

The COMAND operating, display and controller unit manages the audio sources such as CD changer (Code (819) 6-disk CD changer) and the amplifier for sound system (Code (810) Sound system).

These audio sources can be controlled via MOST.

Compass 

The compass display shows:

Making phone calls 

The cell phone (A34/6) is inserted into the UPCI [UHI] (Universal Portable CTEL Interface) cell phone holder (A34/15) and is thereby connected to the Universal Portable CTEL Interface (UPCI [UHI]) control unit (Code (388) Telephone "Handy", UPCI system). The telephone function is included in the UPCI [UHI] (Universal Portable CTEL Interface) control unit (Code (388) Telephone "Handy", UPCI system). The user can operate the system with the COMAND, operating, display and controller unit. The UPCI [UHI] (Universal Portable CTEL Interface) control unit (Code (388) Telephone "Handy", UPCI system) is connected to the COMAND operating, display and controller unit via the MOST.

Navigation 

The COMAND operating, display and controller unit has a navigation module and is responsible for displaying the map and for the entire input management of the navigation system.

TV reception (analog/digital) 

The TV combination tuner is connected to the COMAND operating, display and controller unit via the MOST. The video signals are transferred from the TV combination tuner to the COMAND operating, display and controller unit via a direct Y/C connection.

Audio data are sent digitally to the amplifier for sound system (Code (810) Sound system) via the MOST and then output at the speakers. Video and audio data can be transmitted by the installed rear entertainment system (Code (864) Rear entertainment system).

IMPORTANT All of the video sources can be operated when the vehicle is at a standstill. For reasons of driving safety, no video picture is shown in the COMAND operating, display and controller unit during driving (as of 3 km/h).

Rear entertainment 

The rear entertainment is the entertainment system for rear passengers. The audio-video splitter that is integrated into the DVD player is the central control unit for the rear entertainment. It controls and processes the signals of the internal DVD drive, the TV combination tuner and the optional devices connected to the AUX inputs. The rear entertainment functions are operated using a remote control.

The video signals and the interface are output via the left rear display (A40/5) and the right rear display (A40/6). The audio signals are emitted over the headphones or, if the amplifier for sound system (Code (810) Sound system) is installed, over the speakers.

IMPORTANT The functions of the rear entertainment system (Code (864) Rear entertainment system) are described in greater detail in the rear entertainment function.

Backup camera (RFK) 

The purpose of the backup camera system is to make it easier for the driver to maneuver while backing up and parking.

The system consists of the following components:

The backup camera voltage supply module forwards the camera pictures of the backup camera to the TV combination tuner which then transmits them via a screened line to the COMAND operating, display and controller unit.

If no TV combination tuner is installed, the backup camera voltage supply module directly transmits the camera pictures to the COMAND operating, display and controller unit.

IMPORTANT The functions of the backup camera, code (218) Backup camera are described in greater detail in the backup camera function.

IMPORTANT The functions of the voice control system (VCS [SBS]) (Code (813) Voice control system (VCS [SBS])) are described in the VCS [SBS] function.

  Audio functions   GF82.60-P-2000GZ
  Volume/tone adjustments, function   GF82.60-P-2003GZ
  Voice control system (VCS), function With code (813) Voice control system (VCS) GF82.70-P-0002GZ
  Telephone mode, function with code (386) Preinstallation for portable CTEL UPCI [UHI] system
with code (388) Universal Portable CTEL Interface System
GF82.85-P-2007GZC
  Navigation mode, function   GF82.85-P-2012GZ 
  Rear entertainment, function With code (864) Rear entertainment system GF82.90-P-0002GZE 
  Backup camera (RFK), function With code (218) Backup camera, except code (849) Spare tire holder/spare tire GF54.65-P-0005GZE