My start stop got weak.
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e220 w212
My start stop got weak.
my e220 from 2015 has started to become weak in start stop. When I stop at a red light, it cannot start again after releasing the brake. It has started to do so more and more over time. But only do it sometimes. It starts fine if you turn the key back and start it again. my battery is fine too. Since it is a taxi that runs for many hours. But what could be the cause? sometimes it is weak to restart and sometimes it can't. It only does it at start/stop. ?
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e220 w212
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2017 GLE350 4MATIC
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2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Very interesting symptoms. The ECO start-stop system is not supposed to turn off the engine if there is a remote possibility of not being able to restart.
if the car is starting OK manually, but not automatically there is something subtle on the ECO system. As mentioned above,
- first recharge BOTH batteries,
- properly test the batteries ( voltages mean nothing for proper starting power -> LOAD test them ).
- Check ground wires on : main battery, auxiliary battery, starter ground strap, others in the trunk, passenger/driver footwellls
- scan for codes, note them, delete codes, test drive
if the car is starting OK manually, but not automatically there is something subtle on the ECO system. As mentioned above,
- first recharge BOTH batteries,
- properly test the batteries ( voltages mean nothing for proper starting power -> LOAD test them ).
- Check ground wires on : main battery, auxiliary battery, starter ground strap, others in the trunk, passenger/driver footwellls
- scan for codes, note them, delete codes, test drive
Out Of Control!!
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Flashware near you
Very interesting symptoms.
The ECO start-stop system is not supposed to turn off the engine if there is a remote possibility of not being able to restart.
if the car is starting OK manually, but not automatically there is something subtle on the ECO system. As mentioned above.
- first recharge BOTH batteries,
- properly test the batteries ( voltages mean nothing for proper starting power -> LOAD test them ).
- Check ground wires on : main battery, auxiliary battery, starter ground strap, others in the trunk, passenger/driver footwellls
- scan for codes, note them, delete codes, test drive
The ECO start-stop system is not supposed to turn off the engine if there is a remote possibility of not being able to restart.
if the car is starting OK manually, but not automatically there is something subtle on the ECO system. As mentioned above.
- first recharge BOTH batteries,
- properly test the batteries ( voltages mean nothing for proper starting power -> LOAD test them ).
- Check ground wires on : main battery, auxiliary battery, starter ground strap, others in the trunk, passenger/driver footwellls
- scan for codes, note them, delete codes, test drive
ECO rule No1 is no shutoff without proven battery power. The Bosch ECU is the best thing there is in the world!
Why does this engine fail to restart ...?
There's a TSB about that condition - Check VIN if range is applicable!
I recall it's a logical software bug.
Repair will/may require dealer to flash update to ECU over connected Xentry. Of course, Peter the @BenzNinja can do all that super well for you.
It maybe something additional as well... so use a descent scanner to retrieve your fault codes.
Learn to display your live voltage on w212 dashboard... above 12.6V ??
For free instant joy...:
you can indulge in CAR REBOOTS.
Last edited by CaliBenzDriver; May 29, 2023 at 05:41 PM.
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E550 Coupe 2wd (2016)
My Eco start/stop apparently stops working if the batt is not good. Not sure if it bases it on static voltage, cranking voltage, starting current draw or what, but it seems to know. And my Eco stopped working a year before the battery actually gave me trouble. New batt and Eco came back instantly. I have little faith in the electronics to actually work right so don't assume that an operating Eco means your battery is good. Since it starts fine if you turn the key it tells me electronics are the problem. What exactly is the problem would be interesting to find out, but at what cost, assuming you are not under warranty.
So while I hope you can find the issue and fix it at little cost, it seems to me that turning Eco off is the easiest fix. I dislike Eco and it's just asking for problems imo. Like you're experiencing, plus you're annoying those behind you when you have to fumble to start the car. What worries me more is starter motor and battery life, especially in a Taxi! Price a starter and compare that to how much gas you save using Eco. I do my own repairs so it would be a fraction of the cost, but I'd still be extremely unhappy if it died thanks to over use by the Eco function. Or if it failed to start on me one single time I'd say that negates any bennies over the entire life of the car. Even if it always worked and the starter lasted forever, I find the Eco function super annoying. Plus I enjoy my AC. So after I start the car I turn that thing off first thing. I'm assuming you have a button to turn Eco off? I think we all do but just a guess?
Please post if you find the problem/fix, both for others who have it and our (my) curiosity.
So while I hope you can find the issue and fix it at little cost, it seems to me that turning Eco off is the easiest fix. I dislike Eco and it's just asking for problems imo. Like you're experiencing, plus you're annoying those behind you when you have to fumble to start the car. What worries me more is starter motor and battery life, especially in a Taxi! Price a starter and compare that to how much gas you save using Eco. I do my own repairs so it would be a fraction of the cost, but I'd still be extremely unhappy if it died thanks to over use by the Eco function. Or if it failed to start on me one single time I'd say that negates any bennies over the entire life of the car. Even if it always worked and the starter lasted forever, I find the Eco function super annoying. Plus I enjoy my AC. So after I start the car I turn that thing off first thing. I'm assuming you have a button to turn Eco off? I think we all do but just a guess?
Please post if you find the problem/fix, both for others who have it and our (my) curiosity.
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E400 Wagon
FWIW, when I was having issues with stop start and was getting error codes for random systems, I pulled the aux battery and it measured at 12.7, which is perfectly reasonable. However once I put in a new one they all went away. Don't trust the readings.
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2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Conclusions can only be made using the correct metrics.
Same goes with the alternator. Measuring 14.5V at the battery posts means nothing if the current towards the battery is negative, i.e. discharging. An alternator is measured by its capacity to define the potential/voltage, and its capacity to deliver charge, i.e -> Positive Amps when loaded.
Last edited by JCM_MB; Jun 2, 2023 at 01:43 PM.
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1922 Ford Model T / no OBD
We can use tons of coffee grinds trying to forecast the problem, but the truth is that dealing with computers will not go far without good scanner.
Even my $50 scanner has troubleshooting page, who will show all parameters needed for the function, highlighting those having problems.
Even my $50 scanner has troubleshooting page, who will show all parameters needed for the function, highlighting those having problems.
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w212 E220
Hi. I changed the main battery 6 days ago. Its seen to start stop works normally again.👍 I didn’t test the battery anyway. just ordered a new battery and replaced it. But i will test my start stop at more time and then let you know.
Last edited by Tab007; Jul 11, 2023 at 09:50 PM.
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From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
MBWorld Fanatic!
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Posts: 9,224
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From: V E G A S
1922 Ford Model T / no OBD
The diesel market in USA got screwed at the time, where excellent diesel Peugeot were here in showrooms.
"For some reasons" USA did not import excellent turbo diesels, who were hits in Europe. The NA models of the era lacked HP ,so were too annoying. That was 40 years ago
Than a generation ago - Europe had whole series of "3l cars" who would make 100km on 3 liters of gasoline.
= 78 mpg.
Who in this country won't let the citizens to drive economy cars.?
"For some reasons" USA did not import excellent turbo diesels, who were hits in Europe. The NA models of the era lacked HP ,so were too annoying. That was 40 years ago
Than a generation ago - Europe had whole series of "3l cars" who would make 100km on 3 liters of gasoline.
= 78 mpg.
Who in this country won't let the citizens to drive economy cars.?
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Posts: 739
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From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
The diesel market in USA got screwed at the time, where excellent diesel Peugeot were here in showrooms.
"For some reasons" USA did not import excellent turbo diesels, who were hits in Europe. The NA models of the era lacked HP ,so were too annoying. That was 40 years ago
Than a generation ago - Europe had whole series of "3l cars" who would make 100km on 3 liters of gasoline.
= 78 mpg.
Who in this country won't let the citizens to drive economy cars.?
"For some reasons" USA did not import excellent turbo diesels, who were hits in Europe. The NA models of the era lacked HP ,so were too annoying. That was 40 years ago
Than a generation ago - Europe had whole series of "3l cars" who would make 100km on 3 liters of gasoline.
= 78 mpg.
Who in this country won't let the citizens to drive economy cars.?
Those other vehicles you speak of I understand were the pre emissions vehicles which if they would have just thrown a cat on would have been fine. Early 2000s diesels were actually higher HP here in the US. Many issues that play into this whole drama. US looking for HP gains when the market was young, then when they are looking for mileage about the same time dieselgate occured along with the extreme emissions components among other things. Whole big fubared mess. Oh and most all of the other countries have limited to basically no emissions standards with sulfured diesel and all that yet EPA and CARB destroys the US market because that will make a difference when no one else is doing it besides one or two places.
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w212 E220
My car stil don’t start some time at start stop and now its happening more than before. I have ask one mercedes mechanic and he says you have to change the starter. So it was not the battery that i have replaced. I will get my starter changed and c.
Newbie
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w212 E220
After some weeks of time.
My car stil don’t start some time at start stop and now its happening more than before. I have ask one mercedes mechanic and he says you have to change the starter. So it was not the battery that i have replaced. I will get my starter changed and c.
My car stil don’t start some time at start stop and now its happening more than before. I have ask one mercedes mechanic and he says you have to change the starter. So it was not the battery that i have replaced. I will get my starter changed and c.
A few days ago, my car completely stopped starting. It stopped in the middle of the road. the starter had gone. I have now replaced my starter and now it works perfectly again. It wasn't the battery at all as claimed at the start of this thread. I had a new battery replaced which was not necessary.
Out Of Control!!
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
battery + starter
Hopefully it keeps starting with ECO enabled as expected.
I don't think we can say W212 are plagued with poor starters. They are suposedly built 5x stronger for ECO cycles.
Anywho now, your car is all good to go again !
I don't think we can say W212 are plagued with poor starters. They are suposedly built 5x stronger for ECO cycles.
Anywho now, your car is all good to go again !
Super Member
Joined: Jun 2022
Posts: 739
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From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
A few days ago, my car completely stopped starting. It stopped in the middle of the road. the starter had gone. I have now replaced my starter and now it works perfectly again. It wasn't the battery at all as claimed at the start of this thread. I had a new battery replaced which was not necessary.
If your aux battery is the same age as original main I would probably replace that as well.
