Battery Tender
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Super Member
Joined: Jul 2005
Posts: 514
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From: Naples, FL
2025 AMG CLE53, 2025 Range Rover P550E, 2025 Ford F150 Raptor
Battery Tender
Has anyone installed a battery tender (more of a permanent pigtail fixture on the battery, then plug-in to the tender and outlet) on their car yet?
I can see where the battery terminal is for a jump or access, however wondered if anyone has installed anything related to being on a tender (or charger for the super old school peeps) for a longer period of time to keep the battery up to snuff. I think, as I haven't really researched this entirely, the battery is in a bit of a tougher spot to access (trunk?) and might not be viable for this without tearing things apart.
I can see where the battery terminal is for a jump or access, however wondered if anyone has installed anything related to being on a tender (or charger for the super old school peeps) for a longer period of time to keep the battery up to snuff. I think, as I haven't really researched this entirely, the battery is in a bit of a tougher spot to access (trunk?) and might not be viable for this without tearing things apart.
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Joined: Oct 2019
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From: Colorado
G550
I installed a maintainer connection lead in the engine compartment of my G550.
https://mbworld.org/forums/g-class-w...onnection.html
https://mbworld.org/forums/g-class-w...onnection.html
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Super Member
Joined: Jul 2005
Posts: 514
Likes: 68
From: Naples, FL
2025 AMG CLE53, 2025 Range Rover P550E, 2025 Ford F150 Raptor
I installed a maintainer connection lead in the engine compartment of my G550.
https://mbworld.org/forums/g-class-w...onnection.html
https://mbworld.org/forums/g-class-w...onnection.html
On our previous 2 911s, the battery was up front and in a perfect spot to wire it up and send the line up under the dash near the windshield. I am still wondering how to do this and will figure it out on the CLE53.
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Eggggzactly what I am looking to find and do on the CLE53. Thanks for that link and the pics on the G Forum.
On our previous 2 911s, the battery was up front and in a perfect spot to wire it up and send the line up under the dash near the windshield. I am still wondering how to do this and will figure it out on the CLE53.
On our previous 2 911s, the battery was up front and in a perfect spot to wire it up and send the line up under the dash near the windshield. I am still wondering how to do this and will figure it out on the CLE53.
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From: Agoura Hills, CA
2025 CLE53 | 1969 Camaro Pace Car
I had a Porsche brand charger for my old 911 that had a cigarette lighter end on it, I just plugged it into the cigarette lighter socket and ran the wire through the top of the window.
I believe there's a cigarette lighter socket on the passenger side below the glovebox or somewhere around there.
I believe there's a cigarette lighter socket on the passenger side below the glovebox or somewhere around there.
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Joined: Oct 2019
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From: Colorado
G550
Some of the cig-lighter sockets are now switched. They stay active for a couple minutes after shutting off the car, and some stay active while a door is open. Makes finding what you want (switched or not switched) difficult.
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From: Naples, FL
2025 AMG CLE53, 2025 Range Rover P550E, 2025 Ford F150 Raptor
Speaking of CTEK, I am just going to throw this here https://mbworld.org/forums/coupe-roa...ml#post8548131
I had a Porsche brand charger for my old 911 that had a cigarette lighter end on it, I just plugged it into the cigarette lighter socket and ran the wire through the top of the window.
I believe there's a cigarette lighter socket on the passenger side below the glovebox or somewhere around there.
I believe there's a cigarette lighter socket on the passenger side below the glovebox or somewhere around there.
Thanks everyone for the input...things to think about as at the week progresses.
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Truth. I do have CTEK (their brand, not a rebranded one) for Lithium Ion and regular AGM batteries, so am prepared and ready!
Agreed, that is what they "told" you with the 911, however I had mine hardwired to the battery and will figure out how to do it with the CLE, as soon as I get the time to piddle with it. I never did try the cigarette lighter route and heard mixed results on Rennlist.
Agree here as well. I haven't looked into the cigarette lighter switching on this yet.
Thanks everyone for the input...things to think about as at the week progresses.
Agreed, that is what they "told" you with the 911, however I had mine hardwired to the battery and will figure out how to do it with the CLE, as soon as I get the time to piddle with it. I never did try the cigarette lighter route and heard mixed results on Rennlist.
Agree here as well. I haven't looked into the cigarette lighter switching on this yet.
Thanks everyone for the input...things to think about as at the week progresses.
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Member
Joined: Aug 2014
Posts: 139
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From: SF Bay Area
'08 BMW 335i Coupe '15 E400 Sedan '25 CLE 53 Coupe
The cigarette lighter on the CLE is switched and cannot be used without the ignition on. Notably, the Operators Manual instructs that the vehicle must be turned on while using the TIREFIT kit.
From an earlier thread on trickle charger connection:
https://mbworld.org/forums/cle-class...ml#post9091363
From an earlier thread on trickle charger connection:
https://mbworld.org/forums/cle-class...ml#post9091363
Thread Starter
Super Member
Joined: Jul 2005
Posts: 514
Likes: 68
From: Naples, FL
2025 AMG CLE53, 2025 Range Rover P550E, 2025 Ford F150 Raptor
The cigarette lighter on the CLE is switched and cannot be used without the ignition on. Notably, the Operators Manual instructs that the vehicle must be turned on while using the TIREFIT kit.
From an earlier thread on trickle charger connection:
https://mbworld.org/forums/cle-class...ml#post9091363
From an earlier thread on trickle charger connection:
https://mbworld.org/forums/cle-class...ml#post9091363
More puttering this week to find the exact spot to install battery tender pigtail ends....
Thread Starter
Super Member
Joined: Jul 2005
Posts: 514
Likes: 68
From: Naples, FL
2025 AMG CLE53, 2025 Range Rover P550E, 2025 Ford F150 Raptor
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Joined: Aug 2024
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2025 Mercedes Benz AMG CLE 53 Cabriolet - CLE53A4 - A236 - M256M
One fellow’s review of sub-$100 battery chargers including the Battery Tender and CTEK. The presenter provides a chart and recommendations near the end.
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