Disconnecting both batteries simultaneously
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Joined: Sep 2019
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From: UK
A207
Disconnecting both batteries simultaneously
Hello Please help i going to install a module but need to know what happens if you disconnect both batteries simultaneously
what will I lose
IE radio code required / etc.....
Thanks T
what will I lose
IE radio code required / etc.....
Thanks T
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Joined: Oct 2005
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I believe if you yank the Comand unit out and try to install it in any other MB it will not work. That’s all I know about the unit being coded and branded to each vehicle. There is no start-up code when depowered like other car brands.
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Posts: 9,225
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From: V E G A S
1922 Ford Model T / no OBD
Clocks reset from GPS or cellphone. Not sure exactly.
W212, unlike older brothers does remember all settings. Even my garage & gate code.
For last 20 years MB doesn't install radios on American models.
They install command centers., who I believe need SD to pair with the car, but nothing to reset when power is disconnected.
W212, unlike older brothers does remember all settings. Even my garage & gate code.
For last 20 years MB doesn't install radios on American models.
They install command centers., who I believe need SD to pair with the car, but nothing to reset when power is disconnected.
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24 GLS580 '23 E450 4matic 12 E350 4Matic
My 2003 S500 did not.
Last edited by pierrejoliat; Jun 17, 2020 at 04:04 PM.
Senior Member
Joined: Apr 2016
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From: Phoenix, AZ
2016 E350 Sport 2WD
You asked disconnecting both batteries because you wanted to 'install a module' . Does the module you want to install require both batteries to be disconnected? Does the module have live power to it with the engine/ignition shut off?
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
In any event, I would not disconnect both batteries simultaneously, not that you can at exactly the same time. I would need really freaky LONG arms to disconnect a battery in the engine bay and in the trunk at exactly the same time. 
Sequentially would be a more accurate term.
Depending what "module" you are installing, I would disconnect only the battery most likely to power it, not both... unless a trained auto electrician tells you to disconnect both.
Sequentially would be a more accurate term.
Depending what "module" you are installing, I would disconnect only the battery most likely to power it, not both... unless a trained auto electrician tells you to disconnect both.
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Thread Starter
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Joined: Sep 2019
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From: UK
A207
(Sequentially would be a more accurate term). This is correct DFW Dude ;-)
The module I have installed today is a X car-style Module all went well and is working as it should small problem with the insulation displacement crimps (they are junk) so soldered connections for the power and ground
my mod list:
1, New center caps
2, Install Mercedes laser projectors
3, Install led grill star
4, Convert all interior bulbs to led
5, Door open leds
6, Change door mirrors to sequential led turn signals
7, Rewire for door open mirror sequence (door mirror) (powered from SAM module)
8, Install audio high level converter for amp in boot (install amp)
9, Install diamond amg grill & re-install led star convert led star to RF controlled
10, Install led grill logo
11, Chane reverse lights to high power led
12, Install x car-style roof module
Install moving sills custom made to order (in transit)
Thanks for the info guys
The module I have installed today is a X car-style Module all went well and is working as it should small problem with the insulation displacement crimps (they are junk) so soldered connections for the power and ground
my mod list:
1, New center caps
2, Install Mercedes laser projectors
3, Install led grill star
4, Convert all interior bulbs to led
5, Door open leds
6, Change door mirrors to sequential led turn signals
7, Rewire for door open mirror sequence (door mirror) (powered from SAM module)
8, Install audio high level converter for amp in boot (install amp)
9, Install diamond amg grill & re-install led star convert led star to RF controlled
10, Install led grill logo
11, Chane reverse lights to high power led
12, Install x car-style roof module
Install moving sills custom made to order (in transit)
Thanks for the info guys
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 38
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From: UK
A207
Last edited by Tony MYMB; Jun 18, 2020 at 02:39 PM. Reason: link
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 38
Likes: 14
From: UK
A207
How do you post links to google photo album
last go https://photos.google.com/share/AF1Q...hiUlBiVkdoWHh3
last go https://photos.google.com/share/AF1Q...hiUlBiVkdoWHh3
Last edited by Tony MYMB; Jun 18, 2020 at 03:10 PM.
