GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

How To Access Engineering Mode

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Old 01-16-2010, 02:49 AM
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2020 G63, 2021 E450 All-Terrain Wagon
How To Access Engineering Mode

Hey, do any of you know the codes for entering the COMMAND hidden menus? I have tried so many codes and it is still not working. I have a 2010 vehicle. Any help is appreciated. Thanks!
Old 01-16-2010, 02:59 PM
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This info hasn't been updated in a while but you may want to try it.
http://www.mercupgrades.com/Mercedes...rticle-13.html
Old 01-17-2010, 05:03 PM
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Originally Posted by ksalno
This info hasn't been updated in a while but you may want to try it.
http://www.mercupgrades.com/Mercedes...rticle-13.html
let us know if this works!
Old 01-20-2010, 03:16 PM
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I tried looking at the website, but the COMMAND version is extremely old on this website. Does anyone else have any unlock codes?
Old 01-21-2010, 12:01 AM
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I rather think it's mostly mythology that there is an "engineering mode."

For one thing, Mercedes made in USA use Alpine units rather than the Becker units seen in many Euro-produced models and you can count on them being different.

I do know that for the Becker units, once you did one of the required firmware updates you eliminated any possibility of "engineering mode."
Old 02-18-2010, 03:15 AM
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'09 C63 AMG, '10 ML350 4Matic
It isn't mythology...I've opened it myself on my C63 using end phone call, # and 1 simultaneously.

And that is how MB updated my COMAND to add RSE capability. I just don't have the code for my ML and am trying to find that. I would bet the GL and ML have the same code...
Old 02-18-2010, 05:31 PM
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Originally Posted by ksalno
This info hasn't been updated in a while but you may want to try it.
http://www.mercupgrades.com/Mercedes...rticle-13.html
From the same web site there is a diagnostic mode to increase the volume of your ipod.... http://www.mercupgrades.com/iPod+Vol...rticle-45.html. worked great for me...

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