SL/R231: I can't find the auxilary battery location on my 2015 SL 400
Thread Starter
Newbie
Joined: Jul 2016
Posts: 5
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2015 SL 400, 2001 SL 500 1937 Chevy Panel Delivery hot rod 2004 Ford F-150
can't find the auxilary battery on my SL-class (R231)
It was hit in the nose an set for a while
The main battery in the trunk was DEAD and I put a new one in
It runs and drives but the on dash display gives the following errors
EBD inoperative
Auxiliary Battery Malfunction
Parking brake -(see owners manual)
The parking break appears to be dragging or still on
the last 8 on the vin are FF034596
Also any suggestions on how I can reset the computer
Thanks for your help
The main battery in the trunk was DEAD and I put a new one in
It runs and drives but the on dash display gives the following errors
EBD inoperative
Auxiliary Battery Malfunction
Parking brake -(see owners manual)
The parking break appears to be dragging or still on
the last 8 on the vin are FF034596
Also any suggestions on how I can reset the computer
Thanks for your help
Thread Starter
Newbie
Joined: Jul 2016
Posts: 5
Likes: 0
2015 SL 400, 2001 SL 500 1937 Chevy Panel Delivery hot rod 2004 Ford F-150
can't find the auxilary battery on my SL-class (R231)
OK ... Finally I located the auxiliary battery on my 2015 SL
It is under the fuse box behind the passenger seat
NOW I can replace it and hopefully loose al those non functioning items
It is under the fuse box behind the passenger seat
NOW I can replace it and hopefully loose al those non functioning items
Thread Starter
Newbie
Joined: Jul 2016
Posts: 5
Likes: 0
2015 SL 400, 2001 SL 500 1937 Chevy Panel Delivery hot rod 2004 Ford F-150
can't find the auxilary battery on my SL-class (R231)
Hi again and thanks for the location of the computer
I will have to check it out
I will have to check it out
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Newbie
Joined: Jan 2019
Posts: 3
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2015 Mercedes Benz SL400
Is my auxiliary battery for my 2015 MB SL400 (276)?
My VIN is: XXXXFF034454
1. Is my auxiliary battery under the fuse box behind the passenger seat?
2. If I were to replace it do I lose some (a lot) of electronic settings?...
3. ...can I keep the leads hooked up to my battery tender so as to not lose the electronic settings while I replace it?
thanks
1. Is my auxiliary battery under the fuse box behind the passenger seat?
2. If I were to replace it do I lose some (a lot) of electronic settings?...
3. ...can I keep the leads hooked up to my battery tender so as to not lose the electronic settings while I replace it?
thanks
Last edited by Zogman; Jan 16, 2019 at 01:34 PM. Reason: Need to change yr
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Newbie
Joined: Jan 2019
Posts: 3
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2015 Mercedes Benz SL400
I found the auxiliary battery behind the passenger seat!
Super Member
Joined: Sep 2014
Posts: 660
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From: Franklin, TN
2019 E450 wagon: 2019 BMW 430i: 2013 Chevy Traverse: (departed)2013 SL550 & 2019 E450 cab
D49 posted a great battery reference link a bit ago: you might find what you are searching for on this page: https://mbworld.org/forums/sl-class-...ent-guide.html
Super Member
Joined: Jul 2018
Posts: 563
Likes: 171
From: Nothern Georgia, U.S.A.
'17 SL450, '25 Lyriq, '25 Sonata Hybrid, '96 Corvette GS coupe
I know the aftermarket sells a cheap little cigarette lighter plug with a pigtail that accepts a 9-volt battery, just for maintaining enough system memory voltage to avoid such issues when temporarily disconnecting a vehicle's battery. It works, too...but I have no idea if, or how well, it would work on a car that has two batteries, with one of them disconnected.
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From: God's County (Yorkshire)
Shanks’s Pony
CTEK chargers have a mode for "imitating" your battery while you remove the real thing to maintain all your settings!
