Rear sam
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Senior Member
Joined: Aug 2014
Posts: 336
Likes: 46
gl450 530i
Rear sam
Stupid question but where is the rear sam located? Is it below the subwoofer? Ive been having lots of issues lately with this pile and i believe its due because of the rear sam
Junior Member
Joined: Jan 2011
Posts: 60
Likes: 18
GL450
The rear SAM is in the extreme rear side compartment on the right (passenger) side. It has a twist lock on the door. The SAM is the black metal box mounted at the bottom of the compartment. There are fuses in this compartment as well.
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Joined: Jan 2010
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NGL450 w/EORP, S550
Obviously something had to cause the rear signals acquisition module to fail. Corrosion to terminals caused by fluid leaks are typically the culprit.
Newbie
Joined: Jan 2019
Posts: 4
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GL450
If you need to get to the Rear SAM, you’ll likely need to take out the spare tire and pull back some trim to access it. Although you can see the Rear SAM by opening the small access panel on the passenger’s side by the hatch, it is quite a ways down in. It’s nearly impossible to access the cables, let alone remove and inspect the SAM. Once you go in through the spare tire area though, you’ll have no problem unplugging the cables and removing the assembly for inspection. I’ve been debugging a nonfunctional hatch latch assembly for a couple of months now and dug in there a couple of weeks back.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
Thread Starter
Senior Member
Joined: Aug 2014
Posts: 336
Likes: 46
gl450 530i
If you need to get to the Rear SAM, you’ll likely need to take out the spare tire and pull back some trim to access it. Although you can see the Rear SAM by opening the small access panel on the passenger’s side by the hatch, it is quite a ways down in. It’s nearly impossible to access the cables, let alone remove and inspect the SAM. Once you go in through the spare tire area though, you’ll have no problem unplugging the cables and removing the assembly for inspection. I’ve been debugging a nonfunctional hatch latch assembly for a couple of months now and dug in there a couple of weeks back.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
I have the star diag... just grimlines my issue now is with the most fibee optic my rsdio is stuck on mb logo
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Junior Member
Joined: Feb 2019
Posts: 17
Likes: 5
From: Outside Memphis, TN
GL450 4matic
Check for water under drivers seat (battery tray under passenger seat also collects water). Amplifier is under there. Mine was submerged in about 4 inches of standing water.
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Super Member
Joined: Nov 2018
Posts: 604
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From: Atlanta, GA
2001 S500 (W220) / 2007 GL450 (X164)
If you need to get to the Rear SAM, you’ll likely need to take out the spare tire and pull back some trim to access it. Although you can see the Rear SAM by opening the small access panel on the passenger’s side by the hatch, it is quite a ways down in. It’s nearly impossible to access the cables, let alone remove and inspect the SAM. Once you go in through the spare tire area though, you’ll have no problem unplugging the cables and removing the assembly for inspection. I’ve been debugging a nonfunctional hatch latch assembly for a couple of months now and dug in there a couple of weeks back.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
I also recommend the iCarsoft MBII OBD reader ($150 on Amazon). It allowed me to read codes directly from the Rear SAM to debug (although not yet solve) my hatch issue. I went from shooting in the dark to being able to monitor error codes and on the fly signals. It’s so inexpensive compared to replacement parts, everyone who does DIY Mercedes work should own one.
