S63 AMG 4MATIC Coupe, S65 AMG Coupe (C217), Convert. (A217) 2014 -2021

Trunk battery trickle charger - 2017 S63 cabriolet

Old Oct 12, 2024 | 03:48 PM
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Thumbs up Trunk battery trickle charger - 2017 S63 cabriolet

I have the MB charger and cable to plug into the small port in the trunk (driver's side) but I am missing the small plug that sticks out and I need that to connect the MB cable. Anyone know the part number by chance of that little plug that protrudes from the port? I have attached pics of it, as well as what my port looks like without it.

Thanks in advance for any help, I appreciate it.


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Old Oct 12, 2024 | 06:41 PM
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Well, I'll leave this post up in case it happens to someone else, but I solved the mystery. The missing piece was indeed there and not missing ... it just got pushed in and was sitting flush (that is what you see in the second pic). Of course, when I went to grab it, it fell inside the trunk and completely out of sight. Which gave me the opportunity to take the rear corner of the trunk apart to retrieve it and pull it through the hole. Good times! In actuality, the trunk disassembly wasn't bad ... took about 15 minutes.

MB charger hooked up and working!

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Old Oct 28, 2024 | 08:04 PM
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Originally Posted by Marbenne
I have the MB charger and cable to plug into the small port in the trunk (driver's side) but I am missing the small plug that sticks out and I need that to connect the MB cable. Anyone know the part number by chance of that little plug that protrudes from the port? I have attached pics of it, as well as what my port looks like without it.

Thanks in advance for any help, I appreciate it.

WOW, I never even knew I had this option in the car till I saw your post. I would just connect the trickle charger under the hood. Is there a difference in charging it this way compared through the front?
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Old Oct 29, 2024 | 09:03 AM
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Hi Jekyl, the owner's manual calls out that the car was made to be charged from the driver's side trunk port but I am unsure if it is any different than connecting to the battery in the front. Probably the same result but the trunk system is super slick and I use it every day to keep the battery in peak condition.
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Old Oct 29, 2024 | 10:15 PM
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I don't think I've ever seen this, I'll need to look closer
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Old Oct 30, 2024 | 12:22 AM
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Marbenne, could you post up a pic of the inside of the plug connector, on the side that connects to the trickle charger? Trying to see if it'll mate up with the CTEK Lithium US charger I have: https://cimg8.ibsrv.net/gimg/www.mbw...2624b99f24.jpg
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Old Nov 2, 2024 | 05:49 PM
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You need this cable to connect them:

Amazon Amazon

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Old Nov 5, 2024 | 09:36 AM
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This plug does not exist on my 2016
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Old Nov 7, 2024 | 08:09 AM
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Old Nov 7, 2024 | 08:46 AM
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Thanks a bunch for posting the pic!
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Old Nov 8, 2024 | 02:34 PM
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It is only present in the Cabriolets, presumably because they are unlikely to be driven for prolonged periods during the winters
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Old Nov 10, 2024 | 01:36 PM
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I had no idea!
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Old Nov 10, 2024 | 03:45 PM
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Originally Posted by haa
It is only present in the Cabriolets, presumably because they are unlikely to be driven for prolonged periods during the winters
can be retrofit on any of course
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Old Nov 21, 2024 | 11:15 PM
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So I took a chance and ordered the cord to see if it would mate up to the CTEK charger I had purchased (Lithium US, Part #: 56-926), and it doesn't. It will likely only mate up with the MB-branded CTEK charger. So if anyone is interested in a brand new cord to use with an MB CTEK charger, I have a 100W% brand new unused cord for sale It sells for $60+ new + tax and shipping. Yours for $55 shipped within the US.



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Old Mar 17, 2025 | 04:28 PM
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Old thread but wanted to ask if your Mercedes charger gets hot when plugged in to charger port. Mine seems very hot.
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Old Mar 18, 2025 | 09:06 AM
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Yep. CTEK Charger.
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Old Mar 23, 2026 | 02:30 PM
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Originally Posted by FDNewbie
So I took a chance and ordered the cord to see if it would mate up to the CTEK charger I had purchased (Lithium US, Part #: 56-926), and it doesn't. It will likely only mate up with the MB-branded CTEK charger. So if anyone is interested in a brand new cord to use with an MB CTEK charger, I have a 100W% brand new unused cord for sale It sells for $60+ new + tax and shipping. Yours for $55 shipped within the US.


Hey 'FDNewbie'! What are the chances you still have this adapter? I am also in the TPA area.
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Old Mar 23, 2026 | 07:22 PM
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Originally Posted by vmarroquin
Hey 'FDNewbie'! What are the chances you still have this adapter? I am also in the TPA area.
100%; still have it Shoot me a PM and we can work out the details.
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Old Mar 24, 2026 | 11:05 AM
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I can't PM, probably because I created the account just yesterday.
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Old Apr 12, 2026 | 07:59 AM
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S63 2016 Cabriolet
Help!

Originally Posted by Marbenne
Well, I'll leave this post up in case it happens to someone else, but I solved the mystery. The missing piece was indeed there and not missing ... it just got pushed in and was sitting flush (that is what you see in the second pic). Of course, when I went to grab it, it fell inside the trunk and completely out of sight. Which gave me the opportunity to take the rear corner of the trunk apart to retrieve it and pull it through the hole. Good times! In actuality, the trunk disassembly wasn't bad ... took about 15 minutes.

MB charger hooked up and working!
Can you please explain how you got this panel off? My trickle charger port has recessed like yours had, and i've spent hours and hours trying to get the panel off to no avail. I cannot believe it only took you 15 minutes?!
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Old Apr 12, 2026 | 08:15 AM
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Originally Posted by vmarroquin
I can't PM, probably because I created the account just yesterday.
Gotcha. What's your email?
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