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Rear sam

 
Old 02-14-2019, 01:22 AM
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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
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Old 02-14-2019, 01:31 AM
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I have undervoltage at circuit 30 in component n10 fault code 9045
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Old 02-14-2019, 08:53 PM
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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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Old 02-14-2019, 09:50 PM
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Yes, it’s underneath the subwoofer.
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Old 02-17-2019, 11:55 AM
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Originally Posted by KWStan View Post
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.
Check for water leaks while you're back there, also for hydraulic fluid from the rear hatch opening mechanism.
Obviously something had to cause the rear signals acquisition module to fail. Corrosion to terminals caused by fluid leaks are typically the culprit.
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Old 02-17-2019, 10:24 PM
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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.
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Old 02-18-2019, 02:50 AM
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Originally Posted by Captain Kirk View Post
If you need to get to the Rear SAM, youíll 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 passengerís side by the hatch, it is quite a ways down in. Itís nearly impossible to access the cables, let alone remove and inspect the SAM. Once you go in through the spare tire area though, youíll have no problem unplugging the cables and removing the assembly for inspection. Iíve 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. Itís 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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Old 02-18-2019, 02:45 PM
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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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