E-Class (W214) 2024 -

E450 battery charging

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Old Nov 18, 2024 | 01:32 PM
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2024 GLE 450; 2024 E450
E450 battery charging

Is there a procedure poster, somewhere, that outlines the procedure to hook up a battery charger to a 2024 E450? I ask because I plan on storing my 450 for the winter, as it's far too nice a car to drive on road salt encrusted roads, and it's something that I've done with other cars, in the past. However, with today's "electronics laden" cars, it's not always a good idea to let the battery run down, so I like to put a charger on the car every 5-6 weeks, during the winter.

Obviously, I don't want to do it incorrectly, and mess something up......
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Old Nov 19, 2024 | 05:04 AM
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E Class 220 d
I have a 220D in the Uk and needed to charge my 12v battery and noted that it’s an AMG type battery so your charger needs to support that charging type. Hope this helps you can see this on the label on the battery in the boot/Trunk
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Old Nov 19, 2024 | 09:04 AM
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2025 E450 Sedan: 2019 E450 Coupe
I would use a trickle charger that will keep the battery fully charged, and does not need to be disconnected until you are ready to use the car again. I have not used mine on my W214, but use it for my W238 (2019 E450 Coupe), which tends to sit for extended periods of time.
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Old Nov 19, 2024 | 10:55 AM
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GL450, E450, Porsche 718 GTS
I have a Battery Tender (brand name) that I keep attached to my GL450 as I don’t drive it often. I just hardwired the supplied pigtail to the jump start terminal under the hood and plug/unplug the cord to the pigtail as needed.

Last edited by Hicksra; Nov 19, 2024 at 10:56 AM.
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Old Nov 19, 2024 | 11:31 AM
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IIRC The MB branded trickle charger is a Battery Tender model.
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Old Nov 20, 2024 | 07:58 AM
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I'm reluctant to use a tender, as my garage, where the cars are parked, is attached to my home, and in case of the tender developing an issue, I don't want to burn the house down. I've been using Optima AGM batteries in my Corvette, for a number of years, so I have an Optima charger, which is designed for that type of battery. I'm just looking for some advice as to A) where the battery is located (trunk or engine compartment), and (B) whether there are any special hook-up steps that need to be followed. For instance, in our former Jaguars, you hooked the positive cable from the charger to the (+) post of the battery, and the negative cable from the charger to a ground post of the car's chassis, adjacent to the battery.
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Old Nov 20, 2024 | 08:52 AM
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The battery is in the trunk, but there is a positive and negative post in the engine compartment. You should connect the charger positive first, then negative.
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Old Nov 21, 2024 | 02:59 PM
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S-class, E450 W214, E350 W214
Originally Posted by estark
The battery is in the trunk, but there is a positive and negative post in the engine compartment. You should connect the charger positive first, then negative.
Did they change the location of the 12V battery for the W214? I think the 12V battery is located in the engine compartment for the W213.

Last edited by cruise2024; Nov 21, 2024 at 03:20 PM.
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Old Nov 21, 2024 | 04:03 PM
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W214 E450
Originally Posted by cruise2024
Did they change the location of the 12V battery for the W214? I think the 12V battery is located in the engine compartment for the W213.
For W214 models, it's in the trunk. The 48V is in the engine compartment under the hood.

W214
https://rk.mb-qr.com/en/214.061/

W213
https://rk.mb-qr.com/en/213.0/

Last edited by L1Wolf; Nov 21, 2024 at 04:05 PM.
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Old Nov 21, 2024 | 04:16 PM
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S-class, E450 W214, E350 W214
Originally Posted by L1Wolf
For W214 models, it's in the trunk. The 48V is in the engine compartment under the hood.

W214
https://rk.mb-qr.com/en/214.061/

W213
https://rk.mb-qr.com/en/213.0/
Thanks so much for info. The location of the 12V battery being in the trunk for W214 will make it easier to install a permanent battery tender charging wire directly from the battery to the trunk space for easy charging (or hang it outside even with the trunk lid closed). I have this set up on my S-Class.
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Old Nov 21, 2024 | 04:32 PM
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Originally Posted by L1Wolf
For W214 models, it's in the trunk. The 48V is in the engine compartment under the hood.

W214
https://rk.mb-qr.com/en/214.061/
Thanks for the info. However, this brings up another question, for me, as I'm new to hybrid technology. During storage times, does the 48 volt battery need to be charged, too, or I am OK with just charging the trunk mounted battery.? And the charging posts that "estark" mentioned, are they for the 12 volt battery or the 48 volt battery?

Thanks!!
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Old Nov 22, 2024 | 03:06 PM
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They are for the 12 volt.
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Old Nov 22, 2024 | 05:20 PM
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Originally Posted by estark
They are for the 12 volt.
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