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Comand


This site is about all things COMAND. COMAND is the central control unit on Mercedes-Benz cars.

COMAND Service Menu

To activate the hidden COMAND menu:

  1. Switch on Comand
  2. Select AUX for the audio source
  3. Press Nav button and release
  4. Press and hold Nav + 5

Menu Options

  • Demo Mode
    • On > if you go back to a route it will automatically run through it as if you were driving.
    • Endless > sure its as above but keeps repeating.
    • off > default.
  • Fill destination > fills "last destination memory" with examples.. in germany.
  • ACLine speller > Brings up the address entry window?
  • Task info > Big list of task (just info not selections).
  • Version Info > A list of loads of items with sequential numbers to the left. I.e. Rbolo 1.86 (4), Rom Null??
  • Gps > info on the gps readings; all results no selection.
    • Date
    • Time
    • Fix
    • Sat
    • ALM
    • Altitude
    • Pos
    • DOP
  • Sensors > Backward: Gal; 0/0 gyro ; -10 magazine 0/0
  • Language > List of languages, change this to set speaking language.
  • Set metrics > Speaks for itself. km,m or Miles,ft or Miles, yards
  • VDR test > (test something I dont know??)
  • Calibration > Just says current map with a set option.. set just gives me error.. Yeah im stupid enough to try it. ;)
  • Map colour > Obvious gives you two extra options for night and day colours.. seem very bright to me, maybe for the visualy impaired.. hope they are not driving.
  • Default country > get option Canada, hawai, US.. this doesnt change if i change language.
  • Flash file status > List of DAT files XXXXX.DAT
  • Start nav update > Just flashes, then back to menu???
  • Version Info > comprehensive list. you can choose details on some of these and get further info of vesion; also a long number at the top superceding no.4?? not selectable.
  • test spell match > brings up request param entry bar and send option??
  • Most perform test >looks very interstin not had time to play. has Start, MPH, Async, Control. Tried MPH then it timed out.. maybe cos i wasnt moving??
  • RTE CALC starting point > simply says destination on map and option to set.. couldnt figure it out??
  • Intersection zoom > Sounds cool and obvious.. need to try it while moving
    • on/of toggle
  • SBT State > didnt try it??
    • active/not active toggle.

Navi-DVD

Contents of an E55 '06 Navi-DVD (E848_NA_2095_D1)

Filename Date Size Description
E8-48_NA_2095_D1.DB Nov 2 2004 3,768,320 This seems to be an application. It contains a lot of error and status messages. I don't know what it does and won't look any further into unless i have to.
GPS222.DB Jul 24 2004 182,272 Probably information about the GPS satelites.
SDB_1846b.DB Jul 24 2004 20,895,744 This file seems to contain something language related. It hast 26 files with .SP5 extension. Each of these contain a vocabulary of 200 words with offset and size information. My guess is that the latter point to the voice files for the corresponding language, but I'm still working on determining this.
kN033NA01x06.DB Jul 24 2004 768,960,512 No idea, but my guess is that this file contains the street/map database.
kN033NA01x06g32b.DB
Jul 24 2004 340,033,536 Ditto. No idea, but my guess is that this file contains the street/map database.

Hacking the Navi-DVD

After turning numerous DVD-R into coasters, I finally succeeded into swapping the entries for the USA_FRAU1_V1720.SP5 and GB_FRAU1_V2910.SP5. These files are contained in the sound database (SDB_1846b.DB) file on the Navi-DVD. Now, I'm not claiming this is the easiest way to achieve the desired effect, but it is proof that it can be done and will hopefully motivate others to improve on it.

Here is the procedure:

  1. Create a disk image of your Navi-DVD
  2. Using a Hex-Editor, search for "GB_FRAU1_V2910.SP5" (this might take a while)
  3. Write down the file size and file offset (see example below)
  4. Using the Hex-Editor, search for "USA_FRAU1_V1720.SP5" (this will be very quick)
  5. Write down the file size and file offset (see example below)
  6. Go back to the "GB_FRAU1_V2910.SP5" location and replace the file size and file offset information with that of "USA_FRAU1_V1720.SP5"
  7. Go back to the "USA_FRAU1_V1720.SP5" location and replace the file size and file offset information with that of "GB_FRAU1_V2910.SP5"
  8. Save your changes to disk
  9. Burn a new Navi-DVD
  10. Go into the COMMAND service menu
  11. Select "Start Navi update"
  12. Voilà! You now have a British voice guiding you to your destination for good!

The technically inclined will wonder "Why not simply change the text for 'GB_FRAU1_V2910.SP5' and 'GB_FRAU1_V2910.SP5'?" Well, that's a good question. It's true that it would be simpler, but I noticed that the entries were in alphabetical order. So depending on the search algorithm used by the COMAND unit, it could mess things up badly if one broke the ordering. Nonetheless, someone should try and report back. The authoritative thread on the subject is located here.

 

Offset and Size information for GB_FRAU1_V2910.SP5
/GB FRAU1 V2910.jpg
Offset and Size information for USA_FRAU1_V1720.SP5
/USA FRAU1 V1720.jpg

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Viewing 9 of 9 comments: view all
I see that this site is mainly for the COMAND Navigation DVD system. Has anyone tried modifying the base COMAND system software? It seems that if we can get a hold of the OS used by COMAND we can biuld many new features .. perhaps even add a HDD based navigation to replace the DVD system.
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