Winter Storing AMG GT
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2019 AMG C Roadster
Winter Storing AMG GT
Hi there,
Newbie question here in regards to winter storing a 2019 AMG GT (R190). I have a lithium ion battery and the oem trickle charger/battery tender. After scouring the web and the manual I am unsure what the correct procedure is for storing it over the winter for a few months. My charger has a cigarette socket as well as the clamp option. What is the best/correct way to use this, is it via the trunk socket or am I supposed to pop the hood and clamp it there instead? Any advice from others who have winter stored their GT would be greatly appreciated!
Newbie question here in regards to winter storing a 2019 AMG GT (R190). I have a lithium ion battery and the oem trickle charger/battery tender. After scouring the web and the manual I am unsure what the correct procedure is for storing it over the winter for a few months. My charger has a cigarette socket as well as the clamp option. What is the best/correct way to use this, is it via the trunk socket or am I supposed to pop the hood and clamp it there instead? Any advice from others who have winter stored their GT would be greatly appreciated!
Hi there,
Newbie question here in regards to winter storing a 2019 AMG GT (R190). I have a lithium ion battery and the oem trickle charger/battery tender. After scouring the web and the manual I am unsure what the correct procedure is for storing it over the winter for a few months. My charger has a cigarette socket as well as the clamp option. What is the best/correct way to use this, is it via the trunk socket or am I supposed to pop the hood and clamp it there instead? Any advice from others who have winter stored their GT would be greatly appreciated!
Newbie question here in regards to winter storing a 2019 AMG GT (R190). I have a lithium ion battery and the oem trickle charger/battery tender. After scouring the web and the manual I am unsure what the correct procedure is for storing it over the winter for a few months. My charger has a cigarette socket as well as the clamp option. What is the best/correct way to use this, is it via the trunk socket or am I supposed to pop the hood and clamp it there instead? Any advice from others who have winter stored their GT would be greatly appreciated!
Connect the OEM trickle charger via the trunk socket and leave it on the whole time. This lithium-Ion starter battery need to stay charged at 100% (SOC=100%).
Check this reference:
https://mbworld.org/forums/coupe-roa...ml#post9237653
As a side note. It will be better to post your questions/posts to the GT Coupe forum. You will get a faster response
https://mbworld.org/forums/coupe-roadster-245/
Last edited by G. P; Dec 18, 2025 at 04:23 PM.
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From: SE PA
2020 AMG GT C
I try to avoid charging in sub freezing temps. Apparently not good for the battery. Hasn’t been a problem in my garage but I do monitor ambient temp and will unplug the charger if it goes below freezing.
As a result, most if not all BMS designs incorporate low-temperature charge-inhibit protection specifically to prevent this condition.
While there is no publicly available Mercedes-Benz A123 Systems LLC Li-Ion Starter Battery spec sheet that explicitly documents this behavior, it is highly unlikely that the A123 BMS lacks low-temperature charge protection.
These batteries are less than 10 years old, and BMS-based low-temperature charge cutoffs have been standard practice in lithium battery design well before that timeframe.
However, to your point, this is an important consideration for anyone who parks their car outdoors, without an enclosed garage, on cold winter days while it remains connected to a charger.
From this, it is reasonable to conclude that the battery’s BMS is designed to inhibit or limit charging when the battery temperature is below a safe threshold, thereby protecting the battery from low-temperature charging degradation.
Last edited by G. P; Dec 22, 2025 at 04:38 PM.
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2019 AMG GT R
We can also apply practical real-world logic here. When the vehicle parked outdoors anywhere for an extended period in sustained low ambient temperatures, the battery's temperature will drop below freezing. When the engine is subsequently started under those conditions, the charging system is immediately activated. If charging were allowed to occur at sub-freezing battery temperatures, it could lead to battery damage.
From this, it is reasonable to conclude that the battery’s BMS is designed to inhibit or limit charging when the battery temperature is below a safe threshold, thereby protecting the battery from low-temperature charging degradation.
From this, it is reasonable to conclude that the battery’s BMS is designed to inhibit or limit charging when the battery temperature is below a safe threshold, thereby protecting the battery from low-temperature charging degradation.
Last edited by untamedd; Dec 23, 2025 at 09:16 AM.
