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

2011 GL 350

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Old 03-01-2024, 11:19 AM
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Mercedes-Benz GL Class GL 350
2011 GL 350

Hello I have a 2011 MB GL 350 Blue Tec withb109k miles. The issue I'm having I believe is something electrical or system miscommunication. Out of no where the information cluster goes crazy it lights up like a Christmas tree flash all different signals on and off like ABS, ESP, Pre safe operative, Brake lights, Malfunction, SRS light, Check Engine light, Wipers start going off, RPM needle starts jumping up and down,. Then The car will not want to shift into neutral or park or reverse. I just have to turn it off. Then it won't turn on for a while. And then when it does turn back on it's like as if nothing ever happened.
any advice on what can be the issue? Took to dealership and they were no help.

Last edited by Javi's GL 350; 03-01-2024 at 11:25 AM.
Old 03-01-2024, 12:10 PM
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'08 GL 320 CDI
What did they check/verify at the dealership?

Could be things like a failing battery, bad/corroded connections (at the battery or underhood, including grounds), SAM, etc.
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Old 03-01-2024, 12:43 PM
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2007 GL450
Originally Posted by Javi's GL 350
Hello I have a 2011 MB GL 350 Blue Tec withb109k miles. The issue I'm having I believe is something electrical or system miscommunication. Out of no where the information cluster goes crazy it lights up like a Christmas tree flash all different signals on and off like ABS, ESP, Pre safe operative, Brake lights, Malfunction, SRS light, Check Engine light, Wipers start going off, RPM needle starts jumping up and down,. Then The car will not want to shift into neutral or park or reverse. I just have to turn it off. Then it won't turn on for a while. And then when it does turn back on it's like as if nothing ever happened.
any advice on what can be the issue? Took to dealership and they were no help.
Did you leave it out in the rain?
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Old 03-01-2024, 05:07 PM
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Now just one GL450 with EORP.
Look for water under the drivers seat, well, or the battery well under the passenger seat. This smells like a front Sam frying.
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Old 03-18-2024, 10:46 AM
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Mercedes-Benz GL Class GL 350
Dealership found nothing only recommended to change the battery which they did, the only reason battery died was because the the light on dash will not turn off

Originally Posted by Javi's GL 350
Hello I have a 2011 MB GL 350 Blue Tec withb109k miles. The issue I'm having I believe is something electrical or system miscommunication. Out of no where the information cluster goes crazy it lights up like a Christmas tree flash all different signals on and off like ABS, ESP, Pre safe operative, Brake lights, Malfunction, SRS light, Check Engine light, Wipers start going off, RPM needle starts jumping up and down,. Then The car will not want to shift into neutral or park or reverse. I just have to turn it off. Then it won't turn on for a while. And then when it does turn back on it's like as if nothing ever happened.
any advice on what can be the issue? Took to dealership and they were no help.
Old 03-18-2024, 10:48 AM
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Mercedes-Benz GL Class GL 350
Originally Posted by Max Blast
Look for water under the drivers seat, well, or the battery well under the passenger seat. This smells like a front Sam frying.
battery well, post and connection are clean and dry.

Thanks
Old 03-18-2024, 01:35 PM
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1998 SL500,2011 GL550,2009 ML350,past 1995 E320 Cabrio ,2005 ML500,2006 ML500,1996 SL500,1972 280SEL
Rear Sam Unit.

I would start with the rear Sam unit. Open up your rear hatch and on the passenger side remove the fuse door. Reach under and feel for water or dampness.. the rear taillights can leak. If you feel dampness .. disconnect the battery and tear into the Rear Sam looking for corrosion etc.
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Old 03-18-2024, 01:56 PM
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'08 GL 320 CDI
Originally Posted by Javi's GL 350
Dealership found nothing only recommended to change the battery which they did, the only reason battery died was because the the light on dash will not turn off
What "light on the dash won't turn off"? I didn't see that you mentioned that anywhere? The flashing/crazy light show is not the issue - that is the result of an issue.
Old 03-18-2024, 04:01 PM
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Rear Sam relocate

Very interesting video. After all the rear Sam water corrosion problems .. here is an interesting post.
Here is a picture from the video.




Last edited by vesiadog; 03-18-2024 at 04:05 PM. Reason: problem with link
Old 03-18-2024, 04:15 PM
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Now just one GL450 with EORP.
Originally Posted by Javi's GL 350
battery well, post and connection are clean and dry.

Thanks
There’s also well under the driver seat where all the sensitive electronics such as SAM-F live. Are they dry?

all the things you listed in your initial post are routed by the front Sam.
Old 03-18-2024, 07:45 PM
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Location of Front Sam

On my 2008 GL under the Driver seat is the Radio Power Amp and definitely a strong possibility of water. My front Sam is near the battery under the passenger seat.
Old 03-19-2024, 04:47 PM
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Now just one GL450 with EORP.
Originally Posted by vesiadog
On my 2008 GL under the Driver seat is the Radio Power Amp and definitely a strong possibility of water. My front Sam is near the battery under the passenger seat.
True, front Sam is under the passenger seat in an LHD vehicle.

But wait, there’s more under your driver seat - and it might not be the sam. It could be any and all of the modules or busbars that control power to all the units that are malfunctioning.

You say strong possibility of water, I would think there’s water there and those electronics are compromised.
Old 03-19-2024, 04:53 PM
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Water under driver seat LHD

Originally Posted by Max Blast
True, front Sam is under the passenger seat in an LHD vehicle.

But wait, there’s more under your driver seat - and it might not be the sam. It could be any and all of the modules or busbars that control power to all the units that are malfunctioning.

You say strong possibility of water, I would think there’s water there and those electronics are compromised.
What I found after my Power Amp board went out was about an inch of water under the seat in the valley. Sure looked like the possibility of water spilling from cups in the center console IMO?
Old 03-19-2024, 07:37 PM
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08 GL320 CDI
Originally Posted by eric_in_sd
Did you leave it out in the rain?
What kind of statement is that? It's a vehicle, they get left out in the rain all the time?!?
Old 03-19-2024, 08:14 PM
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Rain

Originally Posted by Sallad
What kind of statement is that? It's a vehicle, they get left out in the rain all the time?!?
Relax I think Eric gets left out in the rain a lot!
Old 03-29-2024, 01:01 AM
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Mercedes-Benz GL Class GL 350
Originally Posted by eric_in_sd
Did you leave it out in the rain?
yes
Old 03-29-2024, 01:03 AM
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Mercedes-Benz GL Class GL 350
Originally Posted by eric_in_sd
Did you leave it out in the rain?
yes
Old 03-29-2024, 02:05 AM
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Now just one GL450 with EORP.
Originally Posted by Sallad
What kind of statement is that? It's a vehicle, they get left out in the rain all the time?!?
some people garage their benzes and don’t drive them in the rain, if you are to believe the average Facebook marketplace ad for a rotten r107 that “just needs a fuel pump or new battery not sure”.
Old 03-29-2024, 10:08 AM
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2007 GL450
Originally Posted by Sallad
What kind of statement is that? It's a vehicle, they get left out in the rain all the time?!?
Yes, one would think. Especially a Gelandewagen.

There are apparently four vulnerable points: Roof rack mounts, sunroof seals and drains, panoramic roof seals, and taillight seals.

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