Permanent battery maintainer pigtail
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Junior Member
Joined: Jan 2024
Posts: 39
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2014 C300 Sport / 2022 GLE 450
Permanent battery maintainer pigtail
Has anyone put a pigtail on for a battery maintainer for easy connection? I had done this on my c300 when the battery was located under the hood, but since the battery on the gle is located under the driver seat and I just have the positive terminal post under the hood, but unsure how to set this up.
2022 GLE 450
2022 GLE 450
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From: Colorado
G550
The terminal under the hood is the best and easiest point to access for charging. The charger's + (red) terminal attaches to it. The negative - (black) charger lead can attach to any bolt that's anchored electrically to the car's chassis. There should be existing forum threads describing pigtail installation. I think I posted my installation a few years back.
Thread Starter
Junior Member
Joined: Jan 2024
Posts: 39
Likes: 5
2014 C300 Sport / 2022 GLE 450
The terminal under the hood is the best and easiest point to access for charging. The charger's + (red) terminal attaches to it. The negative - (black) charger lead can attach to any bolt that's anchored electrically to the car's chassis. There should be existing forum threads describing pigtail installation. I think I posted my installation a few years back.
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Joined: Oct 2019
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From: Colorado
G550
https://mbworld.org/forums/g-class-w...onnection.html
Your battery configuration is likely different, but this should provide you the basics.
Your battery configuration is likely different, but this should provide you the basics.
Senior Member
Joined: Oct 2018
Posts: 380
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From: Orlando, FL
2017 550SL - 2018 560S
CTEK Cable 2026 GLE
My MB dealer installed this for free. Took about 10 minutes. I supplied the CTEK cable.
Last edited by fun33; Feb 24, 2026 at 06:44 AM. Reason: Add text
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
I may be 100% (or more) wrong. We have a charger port on our Sprinter to keep it plugged into a maintainer long term. I was old that on my E's or GLS it is not really plausible as I would want the hood UP during a battery maintainace time frame (the Sprinter sits in our driveay). Maybe I am wrong - but, even with a port you would still want the hood up.
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Senior Member
Joined: Oct 2018
Posts: 380
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From: Orlando, FL
2017 550SL - 2018 560S
I purchased my 2026 GLE from this dealer. The dealer installed the pigtale when I brought the car in for service 2 weeks after I purchased it. Fields Motorcars in Lakeland. If you go to Fields, you need to bring your own cable, and I am sure they will charge you to install it (especially if you did not purchase your car from them), but the install only takes @ 15 minutes.
Last edited by fun33; Feb 25, 2026 at 07:29 AM. Reason: Additional details
Senior Member
Joined: Oct 2018
Posts: 380
Likes: 100
From: Orlando, FL
2017 550SL - 2018 560S
With my setup, as shown in the photo, I connect another 8-foot-long CTEK cable to the permanently mounted cable the dealer installed. I can charge with the hood up or down; it makes no difference.
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From: Colorado
G550
An extension cable works well, especially with a wall mount battery maintainer such as the Noco 1A unit. I avoid running an AC power cord under the hood where it might get pinched.
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Joined: Dec 2016
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From: Central Virginia
2017 MB GLC300 & 2020 GLE350
Would anyone happen to have a photo of the pigtail installed on a 2021 GLE350? Particularly the POS cable tied in under the square black box? It's going to have to be a DIY job since dealer won't touch it!
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GLE 580
MBWorld Fanatic!
Joined: Jan 2023
Posts: 3,130
Likes: 1,205
GLE 580
