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Home >> Mercedes Benz >> 2012 >> CLS 63 AMG (218.374) V8-5.5L Turbo (157.980) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Accessory Control Display >> Description and Operation >> GF82.85-P-3136FQJ Component Description For COMAND Controller Unit

GF82.85-P-3136FQJ Component Description For COMAND Controller Unit




GF82.85-P-3136FQJ Component Description For COMAND Controller Unit
MODEL 218
- with CODE (527) COMAND APS with single DVD drive (with navigation system)
- with CODE (498) Japan version





Shown on vehicle up to 30.6.11
A40/3 COMAND control unit
A40/8 Audio/COMAND display
X18/70 Media interface electrical connector

Location
The COMAND controller unit is located at the front center in the center console, the media interface electrical connection and as of 1.7.11 the USB electrical connection (X115) are located in the center console's stowage compartment under the armrest.





Shown on vehicle as of 1.7.11
A40/3 COMAND control unit
A40/8 Audio/COMAND display
X18/70 Media interface electrical connector (with code (518) Media Interface)
X115 USB electrical connector

Task
The COMAND controller unit fulfills the following tasks:
^ Central operating unit for the entertainment and communication systems integrated into the vehicle
^ Reading in the controls and input signals
^ Evaluation of input factors
^ Activation of output media and system components

Central operating unit for the entertainment and communication systems integrated into the vehicle
The COMAND controller unit provides the user with a structured and uniform interface for the following system components:
- Navigation
- Audio
- Radio (FM, AM)
- CD, DVD
- Memory card
- Music Register
- Media interface
- Bluetooth(R) Audio
- USB electrical connection (X115), in center console's stowage compartment under the armrest, for Universal Serial Bus (USB) memory sticks (as of 1.7.11)
- Telephony (including address book)
- Video
- TV
- Video DVD
- System settings and (as of 1.7.11) Fuel consumption indicator
- Voice control system (VCS [SBS])
- Internet (COMAND Online) (as of 1.7.11)

Reading in the controls and input signals
The input factors are read in via the following connections:
^ Direct line
^ RS-232C interface
^ CAN
^ Media Oriented System Transport (MOST)

Direct line
The COMAND controller unit reads in the following signals via a direct line from the corresponding components:
- AM and FM1 signals from FM 1, AM, ZV and KEYLESS-GO antenna amplifier (A2/18)
- FM 2 signals from FM 2 and DAB antenna amplifier (A2/19)
- Signals for telephony, Bluetooth(R) Audio and, as of 1.7.11, for Internet from Bluetooth antenna (A2/91)
- Signals for telephony and voice control system (VCS [SBS]) from handsfree system microphone (A67b1)
- Audio signals from media interface control unit
- Video signals via a Y/C line from the media interface electrical connector
- Video signals for TV use via Y - brightness (luminance)/C - color information (chrominance) line from digital TV tuner (A90/3)
- Composite Video Baseband Signal (CVBS [FBAS]) from:
- Reversing camera control unit (N66/2) (with code (218) Reversing camera) or
- Media interface electrical connection (X18/70)
- Picture signals for Night View Assist via Y line from Night View Assist control unit (N101) (with code (610) Night View Assist)
- Vehicle Information and Communication System (VICS) signals from VICS control unit (A2/37) (dealer option)
- Signals for diagnosis from COMAND fan motor (M4/13)

RS-232C interface
The COMAND controller unit reads in the Electronic Toll Collection System (ETC) signals over an RS-232C interface from the Electronic Toll Collection control unit (A50/3) (Dealer option).

CAN
The COMAND controller unit is a telematics CAN (CAN A) and interior CAN (CAN B) subscriber
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Media Oriented System Transport (MOST)
The COMAND controller unit receives audio signals from the following control units via MOST:
- TV digital tuner
- Media interface control unit

Evaluation of input factors
The input values are processed in the COMAND controller unit.

Activation of output media and system components
The system components are actuated via the following connections:
^ Direct line
^ RS-232C interface
^ CAN
^ MOST

Direct line
The COMAND controller unit sends signals via direct lines to the following components:
- Audio signals to the speaker system (without code (810) Sound system):
- Left front door speaker (H4/1)
- Left front door tweeter (H4/1h1)
- Right front door speaker (H4/2)
- Right front door tweeter (H4/2h1)
- Left rear door speaker (H4/3)
- Left rear door tweeter (H4/3h1)
- Right rear door speaker (H4/4)
- Right rear door tweeter (H4/4h1)
- Video signals via low voltage differential signal (LVDS) line to the Audio/COMAND display (A40/8).
- Control signals for COMAND fan motor
In addition to issuing electrical signals, the COMAND controller unit also sends voltages to the following components via a direct line:
- Power supply for COMAND fan motor
- Wake-up for MOST to following control units:
- Sound system amplifier control unit (N40/3) (with code (810) Sound system)
- Media interface control unit
- Digital TV tuner
- Switching voltage for VICS control unit (Dealer option)
- Actuation of Electronic Toll Collection control unit (Dealer option)
- Phantom voltage to following components:
- FM 1, AM, CL and KEYLESS-GO antenna amplifier
- FM 2 and DAB antenna amplifier
- Multifunction antenna

RS-232C interface
The COMAND controller unit sends ETC signals over an RS-232C interface to the Electronic Toll Collection control unit (Dealer option).

CAN
The COMAND controller unit is a telematics CAN and interior CAN subscriber.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

MOST
The COMAND controller unit sends the following signals via MOST to the corresponding control units:
- Audio signals:
- Sound system amplifier control unit (with code (810) Sound system)
- Control signals:
- Sound system amplifier control unit (with code (810) Sound system)
- Media interface control unit
- Digital TV tuner

Design





Shown on vehicle up to 30.6.11
1 Function keys
2 Keypad
3 "ON" button
4 Volume control ring collar
5 CD/DVD eject button
6 "C" button (deletes individual characters or complete entry)
7 "Skip back" button
8 "Skip forward" button
9 Memory card slot
10 Memory card ejector button
11 CD/DVD drive

The following components are also integrated into the COMAND controller unit:
- Central computer
- Navigation processor
- Hard disk
- Audio amplifier
- Bluetooth(R) receiver
- Radio tuner

Function
^ Controls
^ DVD drive
^ Navigation and GPS control unit
^ Turn rate sensor
^ Control unit for voice control system (VCS [SBS])
^ Card reader for memory card

Controls
The buttons on the operating panel of the COMAND controller unit are read in and relayed to the central computer. The button operations are processed further in the central computer and forwarded via MOST, the telematics CAN and the interior CAN to the other system components in the form of messages. If the ON button on the COMAND controller unit is pressed, the COMAND controller unit is switched on.
The volume is regulated by turning the ring gear's "ON" button. The function keys switch over to the audio source desired by the user.
In the event of system fault or system crash, pressing the "ON" button for t = 8 s will reboot the COMAND controller unit.

DVD drive
The integrated DVD drive can be used to read in data from the navigation DVD (e.g. navigation update) or play an audio CD/DVD or video DVD.
Only original audio CDs can be converted to the MP3 format and stored on the hard disk.

Navigation and GPS control unit
The navigation processor is integrated into the COMAND controller unit and it uses the incoming antenna signals, wheel speeds and the signal of the turn rate sensor to calculate the location and then - after entering the destination - the route of the vehicle.

Turn rate sensor
The turn rate sensor determines the direction changes of the vehicle.
It is installed into the navigation processor. A calibration is not required.

Control unit for voice control system (VCS [SBS])
The voice commands are processed and evaluated in the COMAND controller unit. The voice outputs for the dialogue with the user are generated in the COMAND controller unit.

Card reader for memory cards
The integrated card reader enables data (except audio data) to be transferred from a memory card onto the hard disk and called up.
Audio data on the memory card can be played from it, but not copied onto the hard disk.

Card reader variants
In vehicles up to 30.6.11 the card reader is compatible with Personal Computer Memory Card International Association (PCMCIA) memory cards.
In vehicles as of 1.7.11 the card reader is compatible with Secure Digital (SD) memory cards.

Diagnosis
The COMAND controller unit is the diagnosis gateway for all MOST subscribers and the directly connected communications control unit.
The diagnostic communication takes place between the COMAND controller unit and the front SAM control unit with fuse and relay module (N10/1) via the interior CAN. The diagnostic communication between the front SAM control unit with fuse and relay module and the diagnostic connector (X11/4) connected to the diagnostic tester is performed via the diagnostic CAN (CAN D).




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