Is Replacing the Auxiliary Battery Easy?
08-14-2018, 04:34 PM
#1
Is Replacing the Auxiliary Battery Easy?
2003 E320 4-Matic. Got the red warning to visit the workshop. Shop said the regular battery is good, but the auxiliary battery needs replacement. Asked for $280. Looks like a replacement online is about $100.
Is it easy to replace by oneself? Thanks in advance for any feedback out there.
Is it easy to replace by oneself? Thanks in advance for any feedback out there.
08-14-2018, 04:54 PM
#2
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'99 CLK/05 E500 WAG
So easy you'll smile....
https://www.pelicanparts.com/techarticles/Mercedes-W211/05-BASICS-Battery_Removal/05-BASICS-Battery_Removal.htm
GL
2MERKS
https://www.pelicanparts.com/techarticles/Mercedes-W211/05-BASICS-Battery_Removal/05-BASICS-Battery_Removal.htm
GL
2MERKS
Last edited by 2MERKS; 08-15-2018 at 06:21 AM.
08-20-2018, 05:27 PM
#6
08-20-2018, 06:21 PM
#7
Super Member
In the engine compartment, On the right side of vehicle up towards the windshield there is a rubber cover held in place by 3 fasteners which you turn 90 degrees, remove the rubber cover, this exposes the cabin filter cover then remove a plastic hold down nut which allows Removal of the cabin filter which exposes the Aux battery.
Last edited by ot1; 08-20-2018 at 06:25 PM.
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08-20-2018, 06:42 PM
#8
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1922 Ford Model T / no OBD
The early W212 have 2nd battery backup for steering and parking brake, so it is small and dash-mounted.
Later models with ECO restart have bigger aux battery in trunk.
Later models with ECO restart have bigger aux battery in trunk.
08-20-2018, 07:53 PM
#9
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'99 CLK/05 E500 WAG
08-20-2018, 08:20 PM
#10
Yes sir - that's the one I have. In Australia it was cheaper to buy the genuine Mercedes Benz replacement than the aftermarket alternative.
Last edited by Gibbo661; 08-20-2018 at 08:20 PM. Reason: correct spelling error
09-17-2018, 12:19 PM
#11
Can anyone help? I bought a cheaper knockoff. I removed the covers and the old MB aux battery. Probably is the bolt/washer that remains does NOT fit my new battery. My new battery came with its own bolt/washer, but I am stumped how to remove the original bolt that connects to the battery. It just spins, and it appears that there are some pinched covers that keep it in place.
Any ideas how to do this? Also, is there a good trick to keeping the washer in place when I can eventually secure it with the new bolt so that the washer doesn't get lost? Maybe use some tape to keep it in place?
Thanks.
Any ideas how to do this? Also, is there a good trick to keeping the washer in place when I can eventually secure it with the new bolt so that the washer doesn't get lost? Maybe use some tape to keep it in place?
Thanks.
09-17-2018, 02:30 PM
#12
Junior Member
Can anyone help? I bought a cheaper knockoff. I removed the covers and the old MB aux battery. Probably is the bolt/washer that remains does NOT fit my new battery. My new battery came with its own bolt/washer, but I am stumped how to remove the original bolt that connects to the battery. It just spins, and it appears that there are some pinched covers that keep it in place.
Any ideas how to do this? Also, is there a good trick to keeping the washer in place when I can eventually secure it with the new bolt so that the washer doesn't get lost? Maybe use some tape to keep it in place?
Thanks.
Any ideas how to do this? Also, is there a good trick to keeping the washer in place when I can eventually secure it with the new bolt so that the washer doesn't get lost? Maybe use some tape to keep it in place?
Thanks.
09-17-2018, 04:41 PM
#14
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2014 E350 also restored: 1969 Camaro convertible SS 1957 Chevy Belair 2dr hardtop
bought mine at pep boys brought the bad one in and the matched it up did not spend more than 15 minutes to disconnect and install
09-19-2018, 09:41 AM
#15
Junior Member
I didn't have to remove the old bolt from the battery cable. It screwed into the terminal perfectly once I put the insert into the terminal block.
11-19-2018, 12:17 AM
#16
Super Member
Last edited by ot1; 11-19-2018 at 12:19 AM.
