2010 GL450 Engineering Mode
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
2010 GL450 Engineering Mode
I'm having trouble locating the Engineering Mode on my '10 GL450. I've been in there before, and I thought I found it in this forum, but I went back twelve pages and still nothing along with several modified searches. I know that there is a three-button push sequence of "hang up," "?," and "?." I can't remember the rest 
. Please do not refer me to the '07, '08, & '09 MB model Command Systems. Their button sequence doesn't work! My purpose is to activate the BlueTooth Streaming capability just like my '10 E550. The correct help is greatly appreciated. 
. Please do not refer me to the '07, '08, & '09 MB model Command Systems. Their button sequence doesn't work! My purpose is to activate the BlueTooth Streaming capability just like my '10 E550. The correct help is greatly appreciated.
Last edited by 6figga; Feb 3, 2012 at 09:19 AM. Reason: Incorrect quotations.
Super Member
Joined: Dec 2005
Posts: 574
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From: Pennsylvania, USA
2011 GL450, '06 R500 traded, '08 ML350 sold
I'm having trouble locating the Engineering Mode on my '10 GL450. I've been in there before, and I thought I found it in this forum, but I went back twelve pages and still nothing along with several modified searches. I know that there is a three-button push sequence of "hang up," "?," and "?." I can't remember the rest . Please do not refer me to the '07, '08, & '09 MB model Command Systems. Their button sequence doesn't work! My purpose is to activate the BlueTooth Streaming capability just like my '10 E550. The correct help is greatly appreciated.
. Please do not refer me to the '07, '08, & '09 MB model Command Systems. Their button sequence doesn't work! My purpose is to activate the BlueTooth Streaming capability just like my '10 E550. The correct help is greatly appreciated. 
MBWorld Fanatic!
Joined: May 2009
Posts: 1,850
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From: New York
2025 Range Rover, 2022 BMW M850 , 2017 MB E400 Coupe
You may try to look at here :
https://mbworld.org/forums/gl-class-...ring-mode.html
https://mbworld.org/forums/gl-class-...ring-mode.html
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
My Findings and Opinion
I found out that the BlueTooth was available for my '10 E550 by reading the W212 forum and entering the Engineering Mode on the Command System.
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
My Opinion
You may try to look at here :
https://mbworld.org/forums/gl-class-...ring-mode.html
https://mbworld.org/forums/gl-class-...ring-mode.html
Thanks but I've tried that one already. Another dud!
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Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
That might work if only I had a "SERV" button and '10 GL450 models don't.
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Joined: Jun 2009
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2020 G63, 2021 E450 All-Terrain Wagon
I've been in engineering mode on my 2010 GL a couple of times. The first time, I messed up my bluetooth, which the dealer had to replace the COMAND Unit for...awk
Anyways, I couldn't find any options for bluetooth streaming although I know it exists: One time, I called someone and my iPhone was playing music in the background on the call due to a software glitch or something. My iPhone wasn't plugged in...it was in the cup holder...
Here is the code: Hang-up, Pound or Star (I can't remember right now lol), and 6, NOT 1.
Anyways, I couldn't find any options for bluetooth streaming although I know it exists: One time, I called someone and my iPhone was playing music in the background on the call due to a software glitch or something. My iPhone wasn't plugged in...it was in the cup holder...
Here is the code: Hang-up, Pound or Star (I can't remember right now lol), and 6, NOT 1.
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
My findings
I've been in engineering mode on my 2010 GL a couple of times. The first time, I messed up my bluetooth, which the dealer had to replace the COMAND Unit for...awk
Anyways, I couldn't find any options for bluetooth streaming although I know it exists: One time, I called someone and my iPhone was playing music in the background on the call due to a software glitch or something. My iPhone wasn't plugged in...it was in the cup holder...
Here is the code: Hang-up, Pound or Star (I can't remember right now lol), and 6, NOT 1.
Anyways, I couldn't find any options for bluetooth streaming although I know it exists: One time, I called someone and my iPhone was playing music in the background on the call due to a software glitch or something. My iPhone wasn't plugged in...it was in the cup holder...
Here is the code: Hang-up, Pound or Star (I can't remember right now lol), and 6, NOT 1.
Thanks! I did find it though this past Friday. It is the following:
END CALL + 6 + *
I didn't see the Bluetooth streaming just as you said but I know it's there somewhere. I'll have to inquire with the dealership next time I go in for service.
Newbie
Joined: Jan 2013
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2010 GL-450
END CALL + 6 + * --> But cant figure out on enabling the BT AUdio. Well dont have guts to mess up with BT 1:Initialize etc options that I could see.
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
From: Harker Heights, TX
2010 E550, 2010 GL450
No I did not find it. Honestly, I just stop looking. I do not think it exists. At this point, I am waiting to trade up to a 2013 GL550. The new body style is bangin'!
