I also have a 2015 ML350 and followed this tip and had no issues. Once everything is back in place cuts aren’t visible. I viewed others where you basically tear the boot apart, why Mercedes never fitted a hatch is beyond me. TOP TIP !!
Thank you for this video. I just bought the auxiliary battery from my local fcp euro for only $48, and I installed it in less than 15 minutes. You can't even tell where I cut the carpet. Amazingly simple.
I have a 2015 ml350 and I did this procedure. Getting to the battery was no problem. I found replacing the battery not that easy unless you have small hands. Getting the bolt for the bracket back in was difficult finally had to remove the rubber part out of the bracket to get the bolt and hole to line up. Also, my flooring is not carpet but part of the molded portion covering the wheel well and does not go back so easily. Thanks, MB with a little more effort you could have found a more difficult place to put the battery.
I can’t believe how easy this was, paid $64 at MB of Valencia and $7 for 10mm ratchet.. did it in 5 min.. once you cut the carpet with a cutting knife, it’s really to notice you even cut it, especially with that net on the side. People, time is money. This was a smart move. Now, I pray the battery under the passenger seat will hold on a while longer.
I watched all the "take the whole back end out" videos - This made much more sense. Two cuts with an Exacto knife and the job was done. You can't see the cuts in this area because it is the first aid kit storage area and the kit hides the hardly perceptival cuts.
Hello, thank you for your feedback and glad this could help. To answer your question, I personally haven’t had any issues with anything falling through the section I cut, it seems to be pretty sturdy. I wouldn’t recommend cutting too far back on both sides, just enough to get through to the battery. I hope this helps.
Hello, the auxiliary battery mainly helps supply power to the interior electronics and other things like the engine start and stop function when you come to a stop (if your vehicle has that). These cars are good about notifying you if something needs to be replaced. Have you seen any messages on your dashboard about the auxiliary battery needing to be replaced? My vehicle displayed that message when the auxiliary battery was starting to give out.
Great video thank you, can I ask where that green wire goes to, mine has came loose and I cant see what it is supposed to be connected to , I have a free lead . maybe the connecting crimp has came off, any idea what it is and where it connects. Many Thanks
World Peace , there’s no support below, but the carpet/material is pretty strong and still holds small items without a problem. I keep leather wipes and micro fiber towels in that small section and no issues so far.
I saw a video and like you said they took all that stuff off and I was wondering if that panel would come out.. Look like it and why they did not try that..
I tried doing it like everyone else, taking everything apart, but it’s a hassle even with the right tools in my opinion . I hope this video is saving people some time and money.
World Peace Hello, You have a good point. A socket wrench would make this a whole lot easier for sure. Hopefully I don’t have to replace this battery anytime soon, but will definitely use a socket wrench next time.
Did you disconnect the main battery? Also what were the symptoms you got that the sec battery was failing? Today my wife told me she saw some weir behavior with the gear shift not working. I have a 2015 ml350
Cesar Bojorquez , hello, no I didn’t have to disconnect the main battery, only replaced the Auxiliary battery, started the car up and the message was gone, everything seemed to go back to normal. In my case, I didn’t notice any symptoms, just got the “auxiliary battery malfunction” message and replaced it within a few days after the part arrived in the mail but my wife still drove it during that time and didn’t notice anything different. I did some research while I was waiting for the battery to make sure nothing serious could happen and found some posts about the same issue you mentioned where the gear wouldn’t change into drive due to a malfunctioning auxiliary battery. I recommend replacing it as soon as possible just so you don’t run into more issues down the line. The auxiliary battery was inexpensive in my opinion, around $50-$60 for an oem aux battery.
Cesar Bojorquez I bought mine from a company called Pelican Parts, they sell oem parts, but I shop around to make sure I’m not over paying. I usually check and compare oem parts from Pelican Parts, Autohauz, and then with the local Mercedes Benz dealer. If the battery you found has the Mercedes Benz logo or it at least states it’s an oem part that sounds like a fair price. Just make sure it’s the correct fit for your model and year.
Hello, I luckily didn’t notice a difference after the auxiliary battery malfunction displayed on my dashboard. I ordered the battery online the same day it happened, got the battery within 2 days, and replaced it right away. I still drove the car those 2 days while the battery was being delivered and didn’t notice anything different. I do know that the auxiliary battery helps supply power to interior electronics, radio, and the start/stop function depending on the year (mostly on the new models that have the start/stop function when you break). I hope that helps.
Hello, you could buy it from a local Mercedes Benz dealer, but I bought mine online from a company I’ve been buying genuine MB parts from for years with no complaints and the price is usually a little better than other sellers including the dealer. The company is called Pelican Parts. Their site will make you choose the make model and year so it can match you up with the right parts for your specific vehicle
just pull the panel where the aux battery stays. Just have to remove the 2 cargo hold down and the lower skid plate pull out the rubber seal. I took out the 10mm bolt holding the aux battery with a gear wrench but was a pain in the butt trying to install it in place. I had to remove the whole aux battery cradle held down by 4 nuts and 1 bolt. Thank you for the idea though
Hello, you can buy them online or at the dealer. Should cost around $50-$60. I bought the battery from a website, pelicanparts.com. I buy a majority of my parts from them.
@@calibenz1097 It did Cali, as I had my main battery replaced today and they wanted $234 to replace the aux battery in my 2012 ML350. Glad I held off on the aux. I will be doing it your way. Keep up the good work, can't thank you enough.
Yes totally makes sense. What some people dont realise is that with the main battery under front seats needs the carpet cut anyways so this is a much more common sense way of doing it
Don Kim thank you. Yes, I bought the part on a website I recommend called Pelicanparts. I just looked it up and the battery is only $50. I didn’t charge it, just replaced the old with the new and the auxiliary malfunction notice went away right away.
You should design for Mercedes. Their engineers can't even think of that? I guess they really like people paying a $1,000 to change a stupid little battery at a dealership.
Doug, just came back from my indy Mercedes repair store and they wanted $247 for battery and labor. Called MB dealership and the battery is $47 and with this vid saved myself $200.
Hello, not sure if you’ve seen other videos on how to gain access to the auxiliary battery but the correct way other videos have shown is to remove so many things just to get to that little battery. I tried doing it the hard way and gave up, almost wanted to take it to the dealer where they would have charged me a lot of money to replace. Instead, I took a chance and cut the carpet and found an easier way to gain access to the battery and replace it from that opening instead of having to take the entire side panel and some other things apart. Replacing the battery the way I showed it on the video took me less than 10 minutes from start to finish. Hope it helps if you’re trying to find a quick, cheap, and easy way to replace it.
@@jcheck6 the aux connectors can and do get loose and as this battery puts out such a small charge can cause problems I fixed by putting in more secure battery connectors
Also when replacing main battery is advisable to put some charge with a jump start battery for example I just use one those lithium ones connected to points under bonnet for jump start as apparently if you don’t and have no power in circuit can be issue when new battery connected with settings etc .. many of the videos suggest this
I also have a 2015 ML350 and followed this tip and had no issues. Once everything is back in place cuts aren’t visible. I viewed others where you basically tear the boot apart, why Mercedes never fitted a hatch is beyond me. TOP TIP !!
Can't thank you enough for this video! You saved me so much time and effort.
Thank you for this video. I just bought the auxiliary battery from my local fcp euro for only $48, and I installed it in less than 15 minutes. You can't even tell where I cut the carpet. Amazingly simple.
Can you share brand and model of the battery? Original is expensive. Still does his job after one year?
Wow, so much better than taking half the trunk apart then it will not fit properly. Thankyou for such great insight
I watched many videos how to replace the auxiliary battery, yours was the simplest and best. Thank you so much.
Great tutorial. Mentioned in a few comments above but putting the battery bracket bolt back in is a “feel” job unless you have tiny hands 😂😂.
I have a 2015 ml350 and I did this procedure. Getting to the battery was no problem. I found replacing the battery not that easy unless you have small hands. Getting the bolt for the bracket back in was difficult finally had to remove the rubber part out of the bracket to get the bolt and hole to line up. Also, my flooring is not carpet but part of the molded portion covering the wheel well and does not go back so easily. Thanks, MB with a little more effort you could have found a more difficult place to put the battery.
I can’t believe how easy this was, paid $64 at MB of Valencia and $7 for 10mm ratchet.. did it in 5 min.. once you cut the carpet with a cutting knife, it’s really to notice you even cut it, especially with that net on the side. People, time is money. This was a smart move. Now, I pray the battery under the passenger seat will hold on a while longer.
I watched all the "take the whole back end out" videos - This made much more sense. Two cuts with an Exacto knife and the job was done. You can't see the cuts in this area because it is the first aid kit storage area and the kit hides the hardly perceptival cuts.
I’m glad this helped and thank you for the comment/feedback!
This totally worked for my 2015 ML 350! Thank you!
Thank you!!!!!! I was stuck with getting one of the bolts loose, this saved me from having to go to the dealer 👏👏👏👏👏👏👏👏👏👏👏
Thanks man. Did the same and saved tons of money and time. My battery is much bigger than urs tho
Do you know where from the auxiliary battery gets his power? From main battery or does the car load it seperatly? Thanks!
Hey, I love the video but I have a question. What happens when you start putting stuff in the net area. Does the carpet still hold in place ?
Hello, thank you for your feedback and glad this could help. To answer your question, I personally haven’t had any issues with anything falling through the section I cut, it seems to be pretty sturdy. I wouldn’t recommend cutting too far back on both sides, just enough to get through to the battery. I hope this helps.
I looked again and there’s a piece of metal that sits under the carpet towards the center and that helps it from not falling down.
Awesome !!! Thanks again for the great help
This worked great. Saved lots of time and money. Thanks.
what exactly does that battery do? Does it also have anything to do with the liftgate pump?
Hello, the auxiliary battery mainly helps supply power to the interior electronics and other things like the engine start and stop function when you come to a stop (if your vehicle has that). These cars are good about notifying you if something needs to be replaced. Have you seen any messages on your dashboard about the auxiliary battery needing to be replaced? My vehicle displayed that message when the auxiliary battery was starting to give out.
Well that’s 100x easier this way. Good video thank you
Great video thank you, can I ask where that green wire goes to, mine has came loose and I cant see what it is supposed to be connected to , I have a free lead . maybe the connecting crimp has came off, any idea what it is and where it connects. Many Thanks
Thank you so much! You’re life saver! Although I have to open the side panel to get the battery out.
Thanks so much for doing this. Saved me a ton of time!~
Good idea I say but is there any support below the area you cut?
World Peace , there’s no support below, but the carpet/material is pretty strong and still holds small items without a problem. I keep leather wipes and micro fiber towels in that small section and no issues so far.
Thank you so much you saved me a lot of hard work.
Thank you for the video. What are the dimensions of the battery? And the part number? Is anything necessary after change by software?
I saw a video and like you said they took all that stuff off and I was wondering if that panel would come out.. Look like it and why they did not try that..
I tried doing it like everyone else, taking everything apart, but it’s a hassle even with the right tools in my opinion . I hope this video is saving people some time and money.
Before I unplug the battery. Do I have to do anything else?
Like disconnect the main battery?
Hello, no, just make sure the car is off and you should be fine. I didn’t have my keys in the ignition when I replaced mine.
Why a gear wrench? Can’t a 10mm socket wrench with a 1/4” ratchet suffice? The reason I ask is if you are saying there is a space issue? Thanks!
World Peace Hello, You have a good point. A socket wrench would make this a whole lot easier for sure. Hopefully I don’t have to replace this battery anytime soon, but will definitely use a socket wrench next time.
Did you disconnect the main battery? Also what were the symptoms you got that the sec battery was failing? Today my wife told me she saw some weir behavior with the gear shift not working. I have a 2015 ml350
Cesar Bojorquez , hello, no I didn’t have to disconnect the main battery, only replaced the Auxiliary battery, started the car up and the message was gone, everything seemed to go back to normal. In my case, I didn’t notice any symptoms, just got the “auxiliary battery malfunction” message and replaced it within a few days after the part arrived in the mail but my wife still drove it during that time and didn’t notice anything different. I did some research while I was waiting for the battery to make sure nothing serious could happen and found some posts about the same issue you mentioned where the gear wouldn’t change into drive due to a malfunctioning auxiliary battery. I recommend replacing it as soon as possible just so you don’t run into more issues down the line. The auxiliary battery was inexpensive in my opinion, around $50-$60 for an oem aux battery.
Cali Benz I see one in Amazon for $49 that looks ok. Did you got yours from the dealer?
Cesar Bojorquez I bought mine from a company called Pelican Parts, they sell oem parts, but I shop around to make sure I’m not over paying. I usually check and compare oem parts from Pelican Parts, Autohauz, and then with the local Mercedes Benz dealer. If the battery you found has the Mercedes Benz logo or it at least states it’s an oem part that sounds like a fair price. Just make sure it’s the correct fit for your model and year.
What reason and why you change this battery what happen that you need to change batteries. Thanks
Hello, I luckily didn’t notice a difference after the auxiliary battery malfunction displayed on my dashboard. I ordered the battery online the same day it happened, got the battery within 2 days, and replaced it right away. I still drove the car those 2 days while the battery was being delivered and didn’t notice anything different. I do know that the auxiliary battery helps supply power to interior electronics, radio, and the start/stop function depending on the year (mostly on the new models that have the start/stop function when you break). I hope that helps.
Thank you. This is beyond perfect.
Hi, my car is 2015 ML 350. Do you know where to order the right anx battery for my car?
Hello, you could buy it from a local Mercedes Benz dealer, but I bought mine online from a company I’ve been buying genuine MB parts from for years with no complaints and the price is usually a little better than other sellers including the dealer. The company is called Pelican Parts. Their site will make you choose the make model and year so it can match you up with the right parts for your specific vehicle
Do i have to disconnect the main battery before replacing AUX battery?
No but make sure your car is off and the keys are not in the ignition.
Brilliant, Genius shortcut; great video, superb, Thanks so much, subscribing now,
just pull the panel where the aux battery stays. Just have to remove the 2 cargo hold down and the lower skid plate pull out the rubber seal. I took out the 10mm bolt holding the aux battery with a gear wrench but was a pain in the butt trying to install it in place. I had to remove the whole aux battery cradle held down by 4 nuts and 1 bolt. Thank you for the idea though
What do these batteries run?
Hello, it ranges from $46-$65 depending where you buy it but most of them are going for $50 online
This auxiliary battery powers the auto transmission select plus other electronics
So if starts but won’t go in gear likely aux battery flat
THank you! Why taking it apart when you can just cut a little :) Amazing.
Where to buy the auxiliary battery?
Hello, you can buy them online or at the dealer. Should cost around $50-$60. I bought the battery from a website, pelicanparts.com. I buy a majority of my parts from them.
Where do I send my check to you?
😄, I hope my video helped. Thank you for the comment and a good laugh.
@@calibenz1097 It did Cali, as I had my main battery replaced today and they wanted $234 to replace the aux battery in my 2012 ML350. Glad I held off on the aux. I will be doing it your way. Keep up the good work, can't thank you enough.
Please how do you know your auxiliary battery is bad ?
Hello, a warning should pop up on the dashboard. It will say something like check/replace auxiliary battery.
Yes totally makes sense. What some people dont realise is that with the main battery under front seats needs the carpet cut anyways so this is a much more common sense way of doing it
I changed mine , I did not cut the carpet , I think some youtube videos exagerate a bit , but it was a 1/2 job .
I would bet this is how the dealership does it but the service manual writes to remove all rear components to charge more labor time and money.
Wow. You are awesome. Thank you. Have a safe blessed day.
Careful, the battery is bigger on my model ML 250 2013.
Great video! Makes sense. Did you buy the battery and just replace it? or did you have to anything else like charging it?
Don Kim thank you. Yes, I bought the part on a website I recommend called Pelicanparts. I just looked it up and the battery is only $50. I didn’t charge it, just replaced the old with the new and the auxiliary malfunction notice went away right away.
Thanks a lot bro. This is soo helpful!
Genius way to access battery
Thanks so much, this really help
That’s great Video ,fuck the carpet is save lotta time just got the small battery out great job thank you
Amazing! Thanks so much for the tip. Much appreciated!!
Thank you for ur video.👍👍👍👍
Wtf, good idea dude, thanks a lot
Wow That's Great Thanks
You should design for Mercedes. Their engineers can't even think of that? I guess they really like people paying a $1,000 to change a stupid little battery at a dealership.
Doug, just came back from my indy Mercedes repair store and they wanted $247 for battery and labor. Called MB dealership and the battery is $47 and with this vid saved myself $200.
Brilliant idea!
Any one know the battery specs
It is sucks . Why you have to cut the Capet ? Anyway you have to open side board to take out battery . What is for cut the board? Just look??
Hello, not sure if you’ve seen other videos on how to gain access to the auxiliary battery but the correct way other videos have shown is to remove so many things just to get to that little battery. I tried doing it the hard way and gave up, almost wanted to take it to the dealer where they would have charged me a lot of money to replace. Instead, I took a chance and cut the carpet and found an easier way to gain access to the battery and replace it from that opening instead of having to take the entire side panel and some other things apart. Replacing the battery the way I showed it on the video took me less than 10 minutes from start to finish. Hope it helps if you’re trying to find a quick, cheap, and easy way to replace it.
Wow! Thanks for this :-)
Battery at mb is $300 vision or century is $22 !!
$257 at my MB dealership and $47 for the aux.
@@jcheck6 the aux connectors can and do get loose and as this battery puts out such a small charge can cause problems I fixed by putting in more secure battery connectors
Also when replacing main battery is advisable to put some charge with a jump start battery for example I just use one those lithium ones connected to points under bonnet for jump start as apparently if you don’t and have no power in circuit can be issue when new battery connected with settings etc .. many of the videos suggest this
@@andrewkennett3665 Many thanks Andrew. Sounds like you might be in the UK.
@@jcheck6 no in Australia ..
I saw that