MERCEDES W205 / S205 / C205 C-CLASS HOW TO REPLACE BATTERY & ECO STOP START FIXED! 

This is the video I have been waiting for so long! My c220d's battery is so old, not just the eco stop is blocked, but it also requires an hour long drive to be recharged, after 2 days idling. I don't think it will make though this winter. But all the videos I found didn't contain so much useful info as yours, so I just kept waiting. Thank you so much!

just watched this video, removed my old battery and just replaced the new one with no problems at all ,still had all radio stations , all windows worked perfectly, drove the car within 2 miles stop start went to green (first time in 2 years). thanks for video, Ray

Ive had my W205 2015 for 4 years and the start/stop has never worked. I assumed that it had been mapped out. I watched this video after getting the on screen message, changed the battery and now it works and the message has gone!! Many thanks

Nice video. I manually disable the start-stop each time I drive. Brings back childhood trauma memories of my dad's old Cortina breaking down....lol.

Thanks I used this to change my battery. Here’s a few discoveries for others. The grip that holds the battery in place does not need to be removed, it is on a bracket that rotates forwards to circulate the battery grip/bar out of the way. If you remove that deep bolt fully, it’s overkill, and worse as in my case, that rotating metal bracket under the battery tray can fall out, it’s only held in place clipped into the plastic, you don’t want to have to get it all back together. Note the plastic cover that goes up to the windscreen has to sit nicely in the rubber channel under the windscreen to keep water out. . When it first comes out it’s stiff if it’s never beeen removed but it does come out after loosening the two clips. Same with the battery cover itself. It will come out but will be stiff . I suggest tie back the negative cable as it gets caught under the battery when loading it.

Excellent video. Just changed my battery on W205 220d. I was dubious about not using a 'secondary' battery but in the end decided that I did not want live terminals getting in the way when I was putting in the new battery. I followed Gavin's video precisely and all went well. Radio and electronic came back on without any problem although I did have my radio code standing by just in case - I've just got to show that the Start/Stop works. I got 6.5 yrs from my original battery and hope that the replacement last as long. Thanks Gavin

Thanks for this, my stop-start hadn't worked since Covid despite putting my battery on a charger overnight and lots of long journeys. Put new battery in and after two miles of driving the symbol turned green for the first time in about 3 years!!

Found this video so helpful...changed the battery, stop start goes green... hallelujah..many thanks... Used Battery Group..Exide battery...all technicals matched...£133 Inc delivery and terminal grease....previous battery was 8 years old....original part...

This answered all my questions. Very useful. Thank you!!

Thanks Mate, I will change my battery tomorrow of my W205. I don't have the OBD power but reading the comments I see no one gad problems. Edit: Did it in 30 minutes, no issues. 👍🏼

Smashing video, my start stop stopped working, then the dreaded auxiliary battery message, spoke to a Mercedes specialist, he told me the auxiliary battery isn’t being charged due to battery, as well as start stop, due to replace my main battery next few days, hopefully it sorts both out…. Thanks for the video

Thanks for this helpful video. Appreciate your enthusiasm!

Thanks for sharing,I really did not know where the main battery was

Thank you for the video, it’s time to change my w213 battery got the check engine light and when I did odb test it showed starter battery has high resistance and when I brought it to my neighboring workshop the technician checked and confirm that the battery level is low 11.6v when idle and 13.5v when ramp to 2000rpm and thus requested me to change the battery which an original Mercedes battery comes to MYR1450 and I contacted my Mercedes dealer and I was told that the price for the same original battery was MYR 2750 and apparently that’s including the reprogramming and they even told me that it will take half a day to just replace the battery. Damm Mercedes is milking money of Their customers. Thank you for confirming that there is no programming needed when a battery is changed now I can just replace it for half the price for the same original battery.

Thanks mate, Quick and simple explanations. I replaced my oem 60Ah with a magnetti marelli 80Ah, slighly longer but it fits 😊

Absolute legend. Well done mate 👍

This video answered all my questions, thanks

Top video many thanks, can confirm c250d no recoding needed, only difficult part for me was its a tight space to get out, the positive temrnial on mine is a monster needs to be nudged well out of the way to pull battery out. Thank u very much

Great DIY Video Tutorial.Thanks

Thanks for the video, I just bought a new battery for my c220d, hopefully this will fix the stop start feature. I've asked mercedes to look into this issue previously but they kept on saying the car hasn't met all the requirements for the stop/start to kick in, thinking back it was probably bullshit from them as they probably didn't want to change the battery under warranty.

viewing from August '22, apart from a great tutorial, its nice to see some rain.

Thank you very informative...

Top video, and what a car too 🔥

Great video man

OMG! FUCKING FIXED IT !!!! THANK YOU A BUNCH! YOUR LEGACY WILL NOT BE FORGOTTEN 🙂

Very useful thank you

Same issue here, changing battery tomorrow after the new one is charged.. Nice video, very usefull, thanks :)

Cheers bud..hope my does the same when I replace it shortly..merry Christmas.

Hi please can you show how you took the plastic covers off to get at your battery also the other side to get at the fuse box many thanks Trevor

Hi, nice video mate👍 do you have a video how to replace front head lights ( led bulbs) . Thank you

I have the same issue and I was told the same thing from dealership . Auxiliary does day after my warranty finished

AWASOME BRO👌

I have the same car as you excepted it is a coupe C class 2017 diesel, I been told by mercedes to put a Gel battery otherwise with time the AGM battery might cause some trouble in the system. Could you help on this one please?

The side little hose was not connected in mine i have now changed the battery and could not even connect it either it's so tight 🙂 but stop-start works now 😁and I could not fit the battery retainer lol half and half job myself, but i will get that sorted

When you changed the auxiliary battery (capacitor) did the warning message disappear straight away from the dash as I’ve put a new one on mine from Mercedes but still comes on the dash as auxiliary battery malfunction?

I’ve just opened the battery cover up to my c220d coupe and it has a large black vent over the batter which was missing in your car?

A simple LIKE ist not enough: Thank you very much!

Top video

can we use EfB Battery instead of AGM for c180 (gasoline vehicle not diesel)

Hi i just change the battery today and still not working the light on dash board is amber !! I should put on charge the new battery? Thanks

I got C350e with battery malfunction. And hybrid range has came down to 7 miles from 16 miles just before the malfunction appeared. Don you think the battery malfunction I am getting is for 12V battery.?

Auxiliary battery malfunction, changed to new Merc battery, still Eco is amber and start/stop not working. Appreciate any suggestion.

Hi, Why can I only watch 3 of the vids for the mersedes. The others aren't available?

Gracias desde España

i have the same problem right now with the start stop system not working since 2 years… .but it doesnt bother me cause i hate it. BUT since 2-3 months i get a new problem. Everytime i start my car from cold the dashboard turn for 1 sec total blackout. As soon as the motor is started its all fine again. Does this "symptom" come from low battery? i hope you can help

On my glc 250 I have the same problem but not only that .. the self park no longer works either. Been told by Mercedes it’s due to the low voltage on the battery too.

Hey dude, i have a w205 but when i imput my car registration it says the model is not compatible?

Please correct me if im mistaken , i have a c class 2017 w205 and its battery is in the boot.

I have the same problem,stop start function not working since 17 months ago having my auxiliary battery( capacity） replaced, I just thought the dealer turned off the function.Now my car says"Stop vehicle,leave engine running"that's mean the battery's capacity is low,but after 50 mins it still here,I realized it's been 5 and half years,it's time to replace the old battery.

Kann es sein, dass der Start-Stopp-Modus aufgrund der Pufferbatterie nicht funktioniert?

Hi Gavin....can I top up charge whilst battery is connected to the car.....or should I remove first....cracking video mate ....sound information

Nice video matey!

I read that you only need to tell the computer you changed the battery if you change the type of battery. Since you replaced it with the exact same type of battery, you don't need to code the battery.

Vorrei capire come cambiare lo specchietto (tutto il pezzo con i cavi)anteriore mercedes classe C w205 del 2015 ... can you help me?

Great video. I changed the Auxillary battery myself (20min job) which cleared the error but still no stop start. The main battery is original but down to 12.2V so I’m going to change it next. Was wondering about whether a new battery needs some coding and happy to hear from you that it doesn’t.

Thanks for the helpful video mate. Our W205 C180 2014MY was bought used from Germany in 2017 apart from 2-3 moments in the beginning start stop never worked. The thing is, the original battery is a 60Ah one for whatever reason, should I replace with a 80Ah like yours? I am leaning towards Yuasa AGM.

Hi and thanks for the information.. I wonder why didn't you charge the old(original) battery and see if you really need a new one? Thanks again

I don’t know how true this is but Halfords refused to change my battery due to it there’s an airbag fuse right on it and it could’ve triggered the airbags in the car at the point of changing on Merc C45

would this be same procedure for the C220D? I had the same problem my stop start stopped working and the auxillary battery warning is popping out my dashboard.

Nice video, do you have to charge new battery before you change?

Have the same issue on my w205 petrol model. Start stop has never worked since I've owned it. Also didn't drive much during lockdown and the Shift to P message keeps popping up. May just change the battery to see if it solves the problem.

Great vid thanks! After changing the battery as you did (in same model Merc) I lost the start stop indication in the top right of the cluster screen. Any ideas?

Hi great video, I changed my battery and alternator is ok no need to change, I’m changing my aux battery tomorrow, but my issue is that sometimes when I start my girl up she doesn’t ignite, but when you let go of the key she fires up, any ideas? 👍👍

Just confirmed for an 2018 A205 in the Workshop Manual the following item: "13. Confirm battery change in front SAM control Model 205 (except 205.012/047/147/212/247), unit in the Actuations menu item.213, 253 except code U98 (LITHIUM-IONEN-STARTERBATTERIE (LISB)) When replacing the on-board electrical system battery (G1). " Same for W205. This to prevent over charging of new battery. TOPDON AL600 OBD2 Scanner code reader with Active Test |ABS&SRS Diagnostics| Car Maintenance Reset Service of Oil, BMS (Battery Maintenance System), SAS| Full OBD2 Functions | Lifetime Free Update | LED Lights.

how does the cover part come off next to the windscreen is it held in place than more than the lock pins

mercedes benz cla 250 2016 when make a complete stop sign after a few seconds the car automatic go on neutral why

So my dad's 2015 C200 is not doing start stop. After reading about it since say its the little auxiliary battery and some say its the main battery. He has no battery related starting issue, so do you think the lack of start stop is linked to the main battery, should be that changed? He has no battery related lights on the dash. Thanks for the informative video though

When you change the battery on a W205 you need to reprogram the Battery Management System (BMS) to tell the car that the battery is new. Its important because the car adjusts the amount of charge it puts into the battery as the battery ages. Hence, if you put in a new battery but do not reset the BMS, the car will overcharge the battery for its young age, reducing the life of the battery in the future. Many scan tools can be used to program the BMS (e.g. XTool D8).

Hi and thanks for the video. Mine shows stop car and shift to P im guessing the battery is low aswell. Where did you buy your battery from.. thanks

In my e300 I suppose to charge the car with another battery while changing the main battery that what dealership said

I have a c350c (2016)and stop start isnt working at all . The car wont even go into emode . Should the auxillary battery in the boot be replaced or is it another issue ? Its annoying having hybrid car and having to drive in petrol .

Hi I have the change to p leave engine running sign up on my and spent around £100 changing the voltage converter and the next day the sign has come up again. Was wondering if this could be the main battery start stop does not work either. I have took to Halfords to test battery he said the battery is fine and took to second garage he said batt needs changing as on 35%. Was wondering if it could be the main battery and before replacing to a new one is it possible to charge the old battery and reinstall that or best buying new one? If so was looking at the Bosch s5 a11 if this is a good batt. Thank you.

Hello my friend l have a w205 c 250 cdi 2015 l have same problem start and stopp button won t work the volt off battery is 11.9 should l change it or charge it ? What do you think how much volt had you on your old battery ??

Hi Gavin, How are you? I have a malfunction with gears warning popping up. After a lot of observations, i think it is because of the start/stop. My car is 2016 C350e. After the warning (malfunction with gears) comes up, the start/stop does not work (engine is always on even when stopped at a traffic lights). Please help. Thank you.

Hi got a 2018, my stop start don’t work. The battery is at 14.4v but the stop start light is amber on the top right of dash. Should I charge it

First thing I do every time I start my car is turn the stop start (or eco as they call it) OFF. I've said since cars started getting these systems fitted that they must shorten the life of not just the battery but the starter motor as well. Unless you spend more time sitting still than moving the gain in fuel economy isn't worth it, not with a new battery being £150 and god knows how much for a starter which most people wouldn't fit themselves. I guess the only upside is that when it stops working it's early warning that the battery is on its last legs.

I turn mine of on my 204 coupe, I just find it annoying. I’m sure it doesn’t do much for your starter motor either

How long does it take to go green, i installed mine mainly done city driving, still amber woth the cross

How old was the battery before you changed it? PS: nice job, well done!

Hi Gavin, I recently fully charged the battery. My stop start is amber and I noticed hold brake is not working. Any advice

Had change the battery on a c300 2015 drove it a few blocks and when I turn in the start/stop button the whole car stop… now my car won’t start. When I turn the ignition on everything thumbs on, lights power windows, but it won’t start the car.

Just to say in my case I've got a 2011 C220 CDI W204 model and when I turn the key the ECO green light comes on with the ECO in yellow on the dash. But as soon as I start the engine both the light and the ECO display then turn off and stay off until I stop the engine and then turn the key again. I must say this has only started happening since I just had my car serviced. I replaced both my main and boot batties in November of 2021 but I don't think the battery in the boot or the front engine bay is the issue as I say all was working fine until it went in for recent servicing. So I'm at a loss as to what's wrong and I don't want to fit a brand-new battery and still end up with the same outcome. So any suggestions as I said everything was fine and now ECO just turns off every time I start the car.

Is it necessary to update the software so that the alternator charges differently?

I need a help. Week ago my car show "stop car and leave engine running". So I changed main battery (by myself). Since then car shows "BATTERY NOT CHARGED" or "CHARGE BATTERY". The new battery is the same as old one, fully charged. Where is the problem??

just wondering did you use a memory saver when changing the main battery? If not, did you have any memory lost (ie. raido stations, GPS location, or anything stored in your computer)? Thanks!

When I make a complete, stop, my car automatic, go neutral

Anyone can help me locat 2017 e300 auxiliary battery location

You don't understand some things, it's good that you bought an AGM battery but Haldfords is poor quality, always buy the original one, just replacing the battery is half the battle, ou have a start/stop button in your car - you MUST code the new battery otherwise the new one will wear out faster, there are videos on jutube on this subject

I replaced my battery but it didn’t fix my stop/start problem 😢

start -stop syst. is a battery killer....very understandable offcourse. I do not like it , so i disconnected the little little extra wire ,now the car "thinks" the battery is weak and deactivates the start-stop system automaticly.

I should have watched your video before going to halfords for them to charge me £50. Ouch.

Did you lost all your settings?

Can anyone tell me the price of the battery

Never buy replacements battery, always buy the original, you earn enough to afford an original battery, you don't drive a Corsa, you drive a Mercedes, FF sake. If cars has a start/stop button you ALWAYS have to adapt a new battery, you're English and you don't understand this so always adapt a new battery with the OBD2 interface, just do it, also you have to "learn" the windows closing because it doesn't work because of the battery replacement. The UK Mercedes service stations are mostly staffed by ordinary local people who don't know much about technical matters and are replaced by immigrants from the EU who have knowledge and experience in technical matters, as in my case when I go to a Mercedes service station I tell them what to do with my car and it is recorded on video so later that I can see what has been done. I only go to a Mercedes service centre to have all my service history or any replacements documented so that they are done at a Mercedes and not in some garage next door. Don't mislead people into thinking that changing a battery is so easy, new cars are not old cars without on-board computers where you could change the battery like in this video 🤨

Good video mate. Dont buy these halfords batteries, specially for mercs take my word for it they are terrible

People that have an alarm fitted make sure you disable or put it on valet mode before you change the battery.

In this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oQKhY3vYyh4.html they confirm there is no need to code or tell the car that the battery has been replaced. So this video is accurate !!!

My brake sensors are kaput. And l dont care, ABS is only for people that never learned to drive properly. I raced for years without it no problems. You dont need all that electronic crap or those sensors that Benz dealers like to pack your tucker chute for you. Cars made in thr 60's and 70's are still the best, this is why they are sky rocketing in price, any fool can work on them. And they don't t need a mechanic with a scan tool😅

Shit reklamen

Wrong wrong wrong DO NOT DO THIS you must keep engine runs otherwise vehicle memory losses.