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GLE Class (V167) Produced 2020 to present

Permanent battery maintainer pigtail

Old Feb 23, 2026 | 02:31 PM
  #1  
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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
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Old Feb 23, 2026 | 03:00 PM
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
The terminal under the hood will still work. All you really need is an always on circuit.
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Old Feb 23, 2026 | 06:30 PM
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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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Old Feb 23, 2026 | 06:48 PM
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Originally Posted by streborx
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.
if you could find it and link me that would be awesome. I’m not familiar with how the positive post is installed and how id connect the pigtail to it
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Old Feb 23, 2026 | 09:54 PM
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https://mbworld.org/forums/g-class-w...onnection.html

Your battery configuration is likely different, but this should provide you the basics.
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Old Feb 24, 2026 | 06:42 AM
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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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Old Feb 24, 2026 | 09:08 AM
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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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Old Feb 24, 2026 | 09:09 AM
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Originally Posted by fun33
My MB dealer installed this for free. Took about 10 minutes. I supplied the CTEK cable.

North Orlando?
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Old Feb 25, 2026 | 07:11 AM
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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
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Old Feb 25, 2026 | 07:15 AM
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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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Old Feb 25, 2026 | 08:29 AM
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Originally Posted by fun33
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.
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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Old Feb 27, 2026 | 11:46 AM
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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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Old Feb 27, 2026 | 12:58 PM
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Originally Posted by cosmobenz
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!
https://mbworld.org/forums/gle-class...ads-guide.html
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Old Feb 27, 2026 | 01:01 PM
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Originally Posted by notlimahrelyt
if you could find it and link me that would be awesome. I’m not familiar with how the positive post is installed and how id connect the pigtail to it
See here:
https://mbworld.org/forums/gle-class...ads-guide.html
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