EQS Long-Term Storage
Thread Starter
Junior Member
Joined: Apr 2015
Posts: 43
Likes: 0
2023 EQS SUV; 2021 911 C2; 2014 E350 Wagon; 2003 Land Cruiser
EQS Long-Term Storage
For those who have parked their EQS in a climate-controlled garage for an extended period of time (with no access for 4 straight months) in the winter, how did you manage your HV battery? I was thinking of doing the following:
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
Super Member
Joined: Nov 2013
Posts: 762
Likes: 166
From: Oregon USA
2023 Mercedes EQS 580 SUV, 2023 Bentley Bentayga, 2023 Genesis GV60
I assume you have it locked? I imagine the alarm system takes some juice.
Senior Member
Joined: Apr 2022
Posts: 264
Likes: 116
No Mercedes yet
I do what my owner's manual recommends:
"If leaving the vehicle idle for lengthy periods, park up the vehicle with a high-voltage battery state of charge between 30% and 50%. Do not keep the high-voltage battery continuously connected to power supply equipment."
This has always worked for me (I'm often away from my EQS for several months at a time). Periodically, the high-voltage battery automatically recharges the 12V battery, and my high-voltage battery charge drops only 1-2% per month.
"If leaving the vehicle idle for lengthy periods, park up the vehicle with a high-voltage battery state of charge between 30% and 50%. Do not keep the high-voltage battery continuously connected to power supply equipment."
This has always worked for me (I'm often away from my EQS for several months at a time). Periodically, the high-voltage battery automatically recharges the 12V battery, and my high-voltage battery charge drops only 1-2% per month.
Senior Member
Joined: Mar 2024
Posts: 355
Likes: 138
From: California
2024 EQE Sedan
For those who have parked their EQS in a climate-controlled garage for an extended period of time (with no access for 4 straight months) in the winter, how did you manage your HV battery? I was thinking of doing the following:
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
Super Member
Joined: Nov 2013
Posts: 762
Likes: 166
From: Oregon USA
2023 Mercedes EQS 580 SUV, 2023 Bentley Bentayga, 2023 Genesis GV60
The only thing the manual says is:If you park the vehicle for a long period, observe the following notes:
- Make sure the high-voltage battery has a sufficient state of charge, especially at very low outside temperatures. That way, you can avoid any problems when the vehicle is subsequently started.
- If possible, avoid parking spaces in direct sunlight.
Trending Topics
Senior Member
Joined: Mar 2024
Posts: 355
Likes: 138
From: California
2024 EQE Sedan
The only thing the manual says is:If you park the vehicle for a long period, observe the following notes:
- Make sure the high-voltage battery has a sufficient state of charge, especially at very low outside temperatures. That way, you can avoid any problems when the vehicle is subsequently started.
- If possible, avoid parking spaces in direct sunlight.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Mar 2023
Posts: 368
Likes: 136
EQE350 SUV 4MATIC
Some of the points under the heading of Charging the high voltage battery:
- If leaving the vehicle idle for lengthy periods, park up the vehicle with a high-voltage battery charge level between 30% and 50%. Do not keep the high-voltage battery continuously connected to power supply equipment.
- Every six months, when the outside temperature is above 50 °F (10 °C), park the vehicle overnight with a charge level below 20%.
- Check the high-voltage battery's charge level every six weeks.
- Charge the high-voltage battery if the charge level is below 20%.
- Do not disconnect the 12 V battery even if the vehicle is left idle for a lengthy period. Otherwise, the condition of the vehicle's high-voltage battery cannot be monitored.
Newbie
Joined: Apr 2012
Posts: 9
Likes: 2
MERCEDES S350
For those who have parked their EQS in a climate-controlled garage for an extended period of time (with no access for 4 straight months) in the winter, how did you manage your HV battery? I was thinking of doing the following:
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
- leave car at 50% SOC
- leave L1 charger that came with the car (110V) plugged in to the EQS, and the L1 charger plugged into a smart outlet. This way I can put it on a schedule to turn on for maybe 2 hours or so a week, on a very low charge rate
Appreciate any thoughts or suggestions you may have. Thanks
Super Member
Joined: Dec 2014
Posts: 820
Likes: 185
From: New England/Florida
2005 SL 500. 2015 S550. 2016 GLE400 2018 S560
I have had a horrible experience this summer storing my 2023 EQS in my climate controlled Florida garage. I left with SOC of 63%. It has remained at 63% SOC since May. The 12v battery is giving a very low state of charge with warnings that remote services are no longer working. I have recently got message that internet connection is no longer working. And to top it off I get a message on the app that the right front window is open and brake fluid is low. I had a friend put on a NoCo trickle charger and still the 12v battery won’t recharge. In previous years when the 12v battery discharged the high voltage battery would kick in and recharge the 12 v. Not this summer. And the SOC would always go down a few percentage points while staying at 63% all this summer. The only thing I can think of that changed from last year was I had the car in for windshield replacement and complained that I never get automatic OTA map updates. They said they installed every current module update and MBUX version and maps would update. Well, they didn’t and now the 12 v battery wont charge like it used to. I suspect because the 12v battery is so low, the internet module won’t work and that’s why I’m getting erroneous read outs on low brake fluid, etc.
Last edited by Radman991; Oct 8, 2025 at 09:48 PM.
Member
Joined: May 2015
Posts: 129
Likes: 20
From: Florida
2025 Porsche Cayenne S Hybrid + 2023 EQS 580 SUV
I have had a horrible experience this summer storing my 2023 EQS in my climate controlled Florida garage. I left with SOC of 63%. It has remained at 63% SOC since May. The 12v battery is giving a very low state of charge with warnings that remote services are no longer working. I have recently got message that internet connection is no longer working. And to top it off I get a message on the app that the right front window is open and brake fluid is low. I had a friend put on a NoCo trickle charger and still the 12v battery won’t recharge. In previous years when the 12v battery discharged the high voltage battery would kick in and recharge the 12 v. Not this summer. And the SOC would always go down a few percentage points while staying at 63% all this summer. The only thing I can think of that changed from last year was I had the car in for windshield replacement and complained that I never get automatic OTA map updates. They said they installed every current module update and MBUX version and maps would update. Well, they didn’t and now the 12 v battery wont charge like it used to. I suspect because the 12v battery is so low, the internet module won’t work and that’s why I’m getting erroneous read outs on low brake fluid, etc.
Last edited by jcapotos; Oct 9, 2025 at 08:31 AM.
Super Member
Joined: Dec 2014
Posts: 820
Likes: 185
From: New England/Florida
2005 SL 500. 2015 S550. 2016 GLE400 2018 S560
the last OTA update wouldn’t update because the 12v battery was not fully charged. I brought it in for service and it turned out my 12v was failing and they replaced the battery under warranty. The dealer replaced battery and left the car in lot overnight and the update was successful
