Gas Smell - Left Car on all day
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Newbie
Joined: Dec 2001
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Thanks guys! Bought the new part and swapped it. Gas smell is gone now, but I have another issue. Gas gauge doesn’t work. Is this related to the part I changed? Everything looks correctly connected. Is there a part I should examine?
Out Of Control!!
Joined: Apr 2019
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Reset R-SAM
Use a scanner to reset your Rear-SAM so it can start again looking at your fuel sensors.
Hopefully nothing got zapped.
Last edited by CaliBenzDriver; Nov 12, 2021 at 01:44 AM.
MBWorld Fanatic!
Joined: May 2012
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From: Pepper Pike Ohio
24 GLS580 '23 E450 4matic 12 E350 4Matic
Cali is usually right, but I'm wondering if you were to disconnect the negative battery terminal for 10-15 minutes and see if it comes back?
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
It's a good day when someone in need receives honest pointers. For that we all provide kindly as a group of wisemen.
Our W212 computers really like to be rebooted with a battery reset, specially the SAMS. Their software is not as rugged as ECU/TCU.
MBWorld Fanatic!
Joined: May 2021
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Not to start an operating system flame war here, but sometimes these cars remind me of Windows computers
If in doubt, reboot. Wonder if they should have a RED reset-push-button in the glove compartment, or next to the ODB connector 
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
computer milk
Modern cars share bones with desktops mother and daughter boards because they are a dozen different suppliers of peripheral modules that are supposed to interoperate well accross a bus. Some conditions are not well stress tested. Updating modules may provide relief or introduce new incompatibilities.
One evidence of F-SAM bug is when you unlock you car in the morning and hear the fan of LED Headlights resume spinning on cold units... LoL.
Parts of the SAMS are always powered ON unlike the other modules that SAMS manage to power down for sleep. This is why when your Benz LimpModes on the road, you get to "play another round" simply by power cycling the ignition. 😊
F-SAM must listens to Keyless for wake up calls to manage power back on...
When SAMS get glitched all day, they go crazy and don't nap any good. Busy overtime work gets payed by the battery.
Hence reboots and floats are a great temporary medicine.
Last edited by CaliBenzDriver; Nov 12, 2021 at 07:31 PM.
