WIS 82.85 Navigation and Communication System (CNS, ICS, COMAND, FleetBoa) A40/3

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COMAND with MOST Block Diagram and Components

COMAND stands for Cockpit Management and Navigation Device and is the display (A40/3) with controls and ports in the centre console.

W220_COMAND_Outline.JPG

The components associated with the COMAND are configured as

W220_COMAND_Configuration.JPG

  • N93 is the Central Gateway Control Unit (CGW). It is located clipped to the driver’s side under-dashboard cover, just above one’s knees. It communicates to the AGW via the CAN-B Bus. CAN (Controller Area Network) B or Interior CAN (also known as body CAN) has a communication speed of 83 kbps.
  • N93/1 is the Audio Gateway Control Unit (AGW). The AGW contains the Tuner (radio), the MOST fibre optic controller and the diagnostic interface The AGW talks to all the other COMAND sub modules via the Optical Fibre in the form of a ‘Fibre Optic Ring’.
  • A40/3 is the COMAND operating, display and controller unit or Head Unit. (Data Card Code 527 COMAND DVD APS with Navigation)
  • N41/1 is the navigation computer and is located in the trunk, left.
  • A2/6 is the CD Changer and is located in the trunk, left. (Data Card Code 819 CD Changer)
  • A2/10 is the TV Tuner and is located in the trunk, left. (Data Card Code 860 TV-Tuner Analog)
  • A35/1 is the Hands free system control module (Bluetooth).
  • A35/11 is the Voice control system control module. (Data Card Code 390 Linguatronic-English)
  • A2/3 is the sound amplifier and is located in the trunk, left.
  • A34/4 is the CTEL interface. (Data Card Code 380 Portable CTEL Preparation Assembly)
  • N112 is the Telecommunications control module.
  • N123/1 is the Universal Portable Cell Phone Interface or UPCI.

Note If a component is removed from the fiber optic bus without connecting the fiber optic leads that went to the component (see posts 7 and 8, http://www.benzworld.org/forums/audi...ow-bypass.html), the entire system will shut down. The loop must be closed with a coupler (bypass) - posts 7 and 8, http://www.benzworld.org/forums/audi...ow-bypass.html.

COMAND Versions

  • The original COMAND (D2B) system was fitted up until around 2003, when it was replaced by COMAND-APS MOST (NTG1).
  • The original COMAND system has CDROM, the later system is DVD based. The newer system uses completely different technology to the older COMAND systems.
  • NTG1 was the first DVD based system fitted to the W211 E class, the CLS class, the old W220 and W215 S and CL classes, the SL and the SLK. The navigation processor was seperate and in the boot (trunk) of the car. The AGW (amplifier, tuner and diagnostic interface) is also part of this setup and it is a seperate hidden unit in the boot or under the passenger feet in the SLK.
  • NTG2 was then introduced for the A/B/C/CLK/ML/R/GL vehicles, the navigation DVD was then in the head unit (with the AGW also).
  • NTG3 was then introduced in the new W221 S and W216 CL vehicles, with an internal hard disk for the map and Bluetooth phone support in the head unit. A seperate rotary controller is used to control the NTG3 unit
  • NTG4 was then introduced for the W204 C class, which is a cost reduced NTG3.
  • And NTG2.5 has been introduced for Model Year 2009 vehicles, which has a built in hard disk, bluetooth, and no seperate controller.
  • MCS II (MOST - NTG2) New Telematics Generation 2 (NTG2) is the name given to the next generation of MOST. Main difference for NTG2 as compared to NTG 1 is that the head unit and the AGW are contained within one unit.
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