MERCEDES A250 l W177 BATTERY REMOVAL & REPLACEMENT l FULL PROCEDURE l DIY
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- เผยแพร่เมื่อ 4 ก.พ. 2025
- Welcome back to Full Throttle - Todays episode I will be showing you how to remove and or replace your 12V battery in your Mercedes A-Class 2018-Present ) Vehicle in the todays episode is a 2019 A250 4 matic.
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Noco Genius 1 Battery maintainer - amzn.to/3SxJ99u
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This is the only video that every owner on this car should watch to replace the battery. Thanks a lot buddy. Pretty straightforward.
Thank you for the kind words and feedback! After knowing the steps to get the battery out it goes very easy. Thank you again for your support and please consider leaving a thumbs up and subscribing if you have not already.
- Full Throttle
Brilliant, clear, well-presented. Excellent video
Thank you for sharing your feedback, truly appreciate your support and kind words. Hope to see you on the next episode!
- Full Throttle
Thanks for the video. Just did it exactly the way you showed. That ECU removal on top of the airbox/filter is a must.
Make sure the battery is fully charged, since 177 models have very poor alternators that are programmed to charge it max 80%
Start car as normal. No screen warning, just MBUX needs awhile to start. Mercedes me app will update status of battery.
One thing you should do is to get the OBD reset for the battery as there is a Ampère counter somewhere in the menu. Getting that done at the dealer
Ps mine is a A220 4matic and it had a 80Ah battery installed from factory. Max length of the tray is 315mm
Thank you for taking the time to reach out and sharing the great info. I apprecoate your support and please co sider subcribing and l3aving a thumbs up if you havent already.
I've just learnt about this so called "smart" alternator.. mor ei read the more dumb it sounds haha. You are right it only charges upto 80% the other 20% will charge when the vehicle is coasting or under braking load.
I was also told by my local dealership the battery does not need to be programed... well that is certainly not correct as you stated it should be registered. I am the process of trying to figure out how to do that with out a dealership or xentry. So far I couldn't find any setting using a Autel Maxi elite scanner. But I was also having trouble communicating with the the front SAM. Hopefully can get this sorted out. It has been a massive pain haha
Thanks a lot for the post! A caucasian with excellent English👏🏻👏🏻👏🏻👏🏻
Thank you for your feed back and taking the time to reach out. Glad to hear you enjoyed the episode. Please consider subscribing and leaving s thumbs up on the episode if you have not already.
- Full Throttle
Awesome video! I figured out the 8mm instead of the female e10. Almost went to go buy that once I came across it in the video. I like how you addressed that at the end. Thank you!!
So glad you enjoyed the episode and found it helpful. Truly appreciate your feedback and support. Please consider leaving a thumbs up and subscribing if you have not done so already.
- Full Throttle
Great video… I just got a new H7 battery delivered and plan to install it this weekend. I’ll let you know how it goes
Thanks for reaching out. That is great news to hear you will be doing the swap your self. After knowing the proper way to remove it is a very easy job just a bit tedious. If you have any issues be sure to let me know and I will help any way possible. I greatly appreciate your support and look forward to hearing how it goes.
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- Full Throttle
Thank you. This video helped me. I like it.
Thank you for reaching out! I love hearing back from my viewers. Your support is greatly appreciated and please consider subscribing if you have not done so already. A quick click greatly helps the channel to grow and bring more great episodes like this one. Enjoy your W177!
- Full Throttle
Thanks for the video.
Do you need to reset computer after battery replacement? any other steps required to align the computer etc?
@@raymondsiu thanks for reaching out, that is a great question! Based off my local Mercedes dealership there was no reset/ or computer relearn needed for the battery replacement. Making it a very DIY friendly job.
The new battery has solved many issues the W177 was having as these cars are so delicate when it comes to proper battery voltage. The bigger battery size should help last longer as well.
I am glad you enjoyed the episode and please consider subscribing and leaving a thumbs up if you have not already done so. Your support is greatly appreciated 🙏
- Full Throttle
@@FullThrottleBHP Merc confirmed this? As if you Battery is low there is a risk your new battery may subsequently overcharge unless you tell the car to refresh the charge value. It could ruin the new battery pretty quickly.
@@mattsmith1051 Yes that is correct on most vehicles. Mercedes dealers local confirmed no Mercedes in my line up AMG W204 R170 SLK X204 and the W177 A class does not require any reset or relearn of the computer charging system. I assume they are correct as I can't see them turning down easy money.
As far research as I could find there's no Mercedes ICE that requires any relearn for a standard 12v battery replacement.
@@FullThrottleBHP Thanks for follow-up; I am about to replace my battery, I think I will get one from local Costco where they have 5 years Warranty :)
@@FullThrottleBHP, just done my battery replacement, saved me hundreds from dealer.
Can you share a video how did you start up the car after battery replacement , the dashboard menu how did reset up.!?!
Thanks
@@admirkapedani2972 Thanks for reaching out. If you enjoyed the episode please consider leaving a thumbs up and subscribing.
After the battery was reinstalled and all components back as they should I was able to start the car using the key, pressing the brake pedal and pressing the start button as usual. No other systems had to be reset.
Hopefully this helps, if there is something else you are looking for please let me know and I'll try to help!
- Full Throttle
@@FullThrottleBHP
Didnt required any reset or anything else, because i was told that they need a computer reset ???
Thnx
@@admirkapedani2972 as far as my local dealer they advised no calibration or reset is required. Vehicle has been operating as it should since.
Absolutele great video, we almost gave up before finding your guide, very well put together and professional edited. Me and my dad thank you for you efforts. Share your PayPal details and will send you a beer.
Truly appreciate the feedback and taking the time to reach out, by far the most complicated battery change on any Mercedes I've ever seen 😅
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- Full Throttle
Do I need to register the new battery in system over OBD? Is that required for this car? I drive a W177 A200 and need to replace the battery. Currently it has a 60 Ah one in and would like to upgrade up to 65 Ah, but not sure, if it's ok. I am from Germany and I went to Mercedes Sservice and they wanted up to 900€ for a replacement, which is weird and want to do that by myself, since it's not a rocket science. Any feedback highly appriciated.
@@markdelphi8075 Thank you for reaching out, I appreciate your support and hope you found the episode helpful. Please consider subscribing and leaving a thumbs up on the episode.
1) Regarding registering the new battery. According to my local dealership they advised me the battery did not need to be registered when replaced. Currently with the cold weather back I am having similar issues of no start when vehicle sits. I reached out to a good friend that is a tech at a different dealer and he advised there is a battery register that needs reset other wise the car may not properly charge the battery leading to early failure. I have not been able to figure out how to do this battery reset using an autel maxisys elite scanner.
2)As you may have noticed in the episode I also upgraded to a larger size battery there is a bit extra room to do so and if you can find the proper battery code to fit I highly recomend it.
3)Mercedes is very expensive to replace the battery. Although it is relatively "simple" it is time consuming as you seen. A lot of steps and pieces to remove on these vehicles. That being said save your money! Follow above and do it your self. The only thing I do recomend is to see if your OBD2 gives you an option for the battery reset. If so please update me how it showed up for you.
Another option would be to see what your dealer would charge for just to register the new battery after you install it, or if they say it needs it or not? I've had a lot of miss information around that part.
I hope this helps, keep me updated how it goes and if you have any other questions be sure to reach out.
- Full Throttle
@@FullThrottleBHP Thank you very much for your effort giving me such a great answer. I am going to replace the battery by myself. And yes, I am going to register it again once replaced. I watched about 5 Videos like yours and only this guy (th-cam.com/video/FZVL2Y29gYk/w-d-xo.html - in German) does registration after replacement. Currently I do have an ELM237 v2.4 OBD II Adapter, which is most probably not able to register the battery. But, I do have a Xentry software (by Mercedes) on my Laptop (like that guy from video, however I have never used it, yet), but that requires a xentry passthru adapter (J2534 protocol), which I do not have at the moment. But I am going to get it in coming days and use it after replacement.
Btw, I would really love to have any technical information about the car, that tells what's maximum battery capacity (Ah) you can use for a specific vehicle model. It's not only about the room a battery physically fits ins, it's also about electronic system if it's able to take energy from the battery with capacity e.g. 70 Ah so that nothing or no system element will be demange because of higher Ah. That's why I a really careful and need to gather as many as possible information.
Years back it was easy since there weren't so man electronics within vehicles. Modern cars are mostly based on that and it's no so easy to change something without being aware of potential issues you gonna face.
I will keep you updated. Thanks again. You were really helpful.
And hier (th-cam.com/video/iIidb8BTLik/w-d-xo.html from 5:58) he shows step by step how the battery is registered. Just for info.
Perfect thank you so much !
You are very welcome! Thank you for reaching out. I am glad you found the episode helpful. Please consider leaving a like and subscribing to the channel if you have not done so already. A couple quick clicks go a long way in supporting the channel and helping us grow plus you wont miss out on future episodes like this one!
Thank you for your support,
- Full Throttle
Will this same process work on a 2020 CLA250? When I pulled the battery cover off it was identical to what you showed.
Thanks for reaching out, yes this should be very similar of not identical to the cla 250. I appreciate your support and please consider subscribing and leaving a thumbs up of you haven't already.
- Full Throttle
SIR AFTER REPLACE THE BATTERY NEED TO RESET ANYTHING?
CAN USE BATTERY MEMORY SAVER TO CONNET TO OBD2?
Thank you for reaching out. After battery is replaced there is nothing that needs to be reset. Everything was same as before. You should be able to use memory saver with obd2 if you want.
Please consider subscribing and leaving a thumbs up if you enjoyed the episode. Your support is greatly appreciated.
- Full Throttle
Massiv help
Thank you for reaching out, so glad to hear you found the episode helpful. Please consider subscribing and leaving a thumbs up if you have not done so already. Your support is greatly appreciated and be sure to stay tuned for more W177 content.
- Full Throttle
If I can't drive for a few months, do I need to disconnect the battery to avoid running out of power? Is there any way to disconnect the battery without disassembling the entire mount?
Thank you for reaching out, I hope you enjoyed the episode and found it helpful. If the car is going to be sitting for a few months it is would be highly advisable to remove the battery terminals from the battery so it does not drain and cause damage to your battery. A better and easeir option would be to purchase a battery maintainer/charger. This unit will keep your battery charged to the proper level when not in use. I use this for 6months or more at a time while my summer vehicle is stored over winter. You can easily connect the terminals to the positive and negative "jumper" posts under the hood saving you the trouble of removing this cover.
Noco genius 1 Charger battery maintainer - amzn.to/4fsV4gF
Noco Genius 5 Charger Maintainer - amzn.to/3OXgGHv
I hope this helps and if you have any other questions be sure to reach out any time. Also consider subscribing and leaving a thumbs up. your support is greatly appreciated.
- Full Throttle
Does anyone know where to find the pyro fuse of an w117 A180 facelift 2024?
Some say its behind the Dashboard but can’t find official documents backing it. And don’t really look forward to take off the whole Dashboard to find out it’s placed somewhere else
@@itszhype9854 Thanks for reaching out, normally the Pyro fuse is directly on that battery to disable full power to the vehicle in an event of a crash.
I would recomend reaching out to your local MB dealer to confirm location they should be able to narrow it down for you.
I hope this helps or maybe someone else will be able to reach out with further info.
- Full Throttle
Hey! Thanks for the response, unfortunately the Pyro fuse was located under the dashboard… so I had to take the whole dashboard and center console out to reach it. So for anyone wondering where the Pyro fuse is on a W177 A180 2024 Facelift, it’s under the dashboard behind the main speaker.
What a mess!
Certainly not as straight forward as the "older" Mercedes use to be haha. Hope you found the episode helpful and straight forward.
- Full Throttle
@@FullThrottleBHP helpful? For sure! Thx for you guide
Crazy idea for such a hightech car to design a ridiculous difficult battery swap. Again blocking the right to repair yourself.
Not everyone has a Torx-E10 socket laying around 😡