Memory Glitches
Thread Starter
Junior Member
Joined: Jan 2016
Posts: 73
Likes: 31
From: Newnan, GA
Lunar Blue 2013 S550
Memory Glitches
Hello all,
Our 2013 S550 has exhibited a couple of glitches recently. The first thing I noticed is after startup, the cabin temp was set to 76 F (both sides). Neither my wife nor I ever set it that high. It seems to have done this while just sitting in the garage. The second thing is my wife reported her #1 seat memory was lost. She had to readjust and reset the memory after which both memory 1 and 2 appear saved, for now. This third thing is the car cranked but didn’t start on the first attempt. On the second attempt, the car started and ran normally. This has happened twice so far. So, it sounds like some electrical issue. The battery was replaced in October 2022, so I don’t think it’s a weak battery. Not sure but I don’t believe our 2013 has a secondary (memory) battery. No battery or other warning lights, any Ideas?
Thanks!
Our 2013 S550 has exhibited a couple of glitches recently. The first thing I noticed is after startup, the cabin temp was set to 76 F (both sides). Neither my wife nor I ever set it that high. It seems to have done this while just sitting in the garage. The second thing is my wife reported her #1 seat memory was lost. She had to readjust and reset the memory after which both memory 1 and 2 appear saved, for now. This third thing is the car cranked but didn’t start on the first attempt. On the second attempt, the car started and ran normally. This has happened twice so far. So, it sounds like some electrical issue. The battery was replaced in October 2022, so I don’t think it’s a weak battery. Not sure but I don’t believe our 2013 has a secondary (memory) battery. No battery or other warning lights, any Ideas?
Thanks!
Super Member
Joined: Nov 2021
Posts: 893
Likes: 397
From: Hong Kong, China
2021 S450 4Matic
I think your W221 2013 S550 has two batteries. Main one is in the engine compartment (ie under the hood). Second one is in the trunk (under its floor or behind the rear seats).
Go to your car and physically check it.
Go to your car and physically check it.
Member
Joined: Jan 2011
Posts: 212
Likes: 70
2003 S55 (SOLD) , 2012 S550
2013 has only 1 main battery under the hood and a small backup battery in the dash. When that one goes low or bad you will get a notice in the display. Check the terminals on the main battery and also the ground cables. You might have a iffy connection somewhere.
Good Luck.
Good Luck.
MBWorld Fanatic!
Joined: Aug 2014
Posts: 5,322
Likes: 1,678
S500
new batteries are not as well made as the originals, they seem to more easily lose charge and only last 18 months before playing up
it might be connected - but I think its two issues, not just this later one - many Mercedes seem to become more and more power hungry as they get older - now that's not possible IF things stayed as they were - but they don't - various comms seem to become more and more muddled and various bits remain part alive dragging down the current
you don't need to believe me - but you do need to be on top of the energy demand your car needs to play happy
old e classes used to get water in the door handles and that would drain their battery, then roof and screen drains slowly clog and damp builds under carpets and canbus networks "oddly placed hidden in damp areas" start to get random, then the comand fan wears and that starts to get hot and bothered and this forgets to fall asleep - but the real fun starts when the SAM modules take a bath and circuit boards fur up
it might be connected - but I think its two issues, not just this later one - many Mercedes seem to become more and more power hungry as they get older - now that's not possible IF things stayed as they were - but they don't - various comms seem to become more and more muddled and various bits remain part alive dragging down the current
you don't need to believe me - but you do need to be on top of the energy demand your car needs to play happy
old e classes used to get water in the door handles and that would drain their battery, then roof and screen drains slowly clog and damp builds under carpets and canbus networks "oddly placed hidden in damp areas" start to get random, then the comand fan wears and that starts to get hot and bothered and this forgets to fall asleep - but the real fun starts when the SAM modules take a bath and circuit boards fur up
Thread Starter
Junior Member
Joined: Jan 2016
Posts: 73
Likes: 31
From: Newnan, GA
Lunar Blue 2013 S550
2013 has only 1 main battery under the hood and a small backup battery in the dash. When that one goes low or bad you will get a notice in the display. Check the terminals on the main battery and also the ground cables. You might have a iffy connection somewhere.
Good Luck.
Good Luck.
Thanks!
Super Member
Joined: Dec 2018
Posts: 857
Likes: 501
From: Washington, DC
2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
You may also have a parasitic drain on the battery from a stuck relay or another iffy component causing your problems. After the clean up you mention, if this happens again; try hooking up a multimeter and check voltage and miliamps after the car is shut down and goes to sleep. Report the numbers back here to us. You can also remove one fuse at a time looking for the bad draining circuit. And of course, the obvious, check for an interior light or glove box light that doesn't go to sleep with the rest of the car on shut down. My bet is something is draining your battery.
That is your issue. Get a battery maintainer and hook it up when the car is not being driven.
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Super Member
Joined: Dec 2006
Posts: 972
Likes: 191
From: Atlanta
W222 AMG S63
Some of these cars may actually have 3 batteries:
EDIT: SOME of these cars may have a third battery. I just checked my car (2008, pre-facelift) and it does not have that third battery behind the light switch. The car in the video above is a 2010 facelift version. Maybe it was added then.
- A large one under the hood.
- An even larger one behind the rear seat, accessible via the trunk.
- A small one in the area behind the light switch as seen below. This is the one that saves your settings when you remove the other two batteries.
EDIT: SOME of these cars may have a third battery. I just checked my car (2008, pre-facelift) and it does not have that third battery behind the light switch. The car in the video above is a 2010 facelift version. Maybe it was added then.
Last edited by CQHall; May 1, 2023 at 10:14 AM.
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Super Member
Joined: Dec 2006
Posts: 972
Likes: 191
From: Atlanta
W222 AMG S63
For those following this thread, I've edited my post above. Not all of these cars have a third battery. My 2008 S63 does not.
EDIT: I also called the dealership parts department and gave them my VIN and they also said that there are only two batteries for my car.
EDIT: I also called the dealership parts department and gave them my VIN and they also said that there are only two batteries for my car.
Last edited by CQHall; May 1, 2023 at 10:40 AM.
