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E Class Estate W213, ECO stop/start engine does not restart, intermittent issue

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Old Nov 4, 2023 | 03:53 PM
  #1  
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E class Estate w213
E Class Estate W213, ECO stop/start engine does not restart, intermittent issue

Hi everyone,

Newbie here.

I have a late 2018 e class estate that has been working well since ownership; however, the infamous ECO stop/start is causing me issues (which can be dangerous)

The issue is intermittent but happened twice yesterday (and a number of times over the last month). Essentially when ECO stop is engaged (green A) the engine fully cuts off and all lights on the dash come up (like when you press the start button once).

Been researching everywhere and cant seem to see whats the issue. Also had a diagnostic on the car two days ago which had some error codes cleared but as noted above the issue still happened yesterday.

Would be most grateful for any advice or suggestions.

Thank you
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Old Nov 4, 2023 | 10:16 PM
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My S class 560 2018 car does that sometimes. Very rarely actually but you'll come to a light and the car will turn off like normal when eco is on but then when the red light turns green you take your foot off the brake and push the gas and it does not go. Then you start hitting the start button and it does not start. In the meantime you have a line of cars behind you beeping their horns and looking ready to kill you. I learned a long time ago first time when I get in the car after starting it I turn the eco button off. I figured the dealer would probably never figure out what the issue really is. I put a aux battery in the car a year ago and thought maybe that might correct the issue, nope it's some kind of bug in the system I dunno what.
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Old Nov 5, 2023 | 06:28 AM
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Exactly the same issue!! Will start switching off, it’s annoying as sometimes I do forget.

will be calling the dealer tomorrow to see if I can get any insights from their side
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Old Nov 5, 2023 | 10:57 AM
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Consider buying the module available on eBay and elsewhere that changes the default setting for ECO Start/Stop to OFF.

You can still activate the "feature" if for some unfathomable reason you want to by simply pressing the ECO button, and you can reverse the change so that ECO Start/Stop is again the default (i.e. automatically on when you start the car).
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Old Nov 5, 2023 | 11:13 AM
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The casue of this is an issue with the gearbox software. It happened to me about a year ago, half a dowen times or so an then I cleared the fault codes and it went away. I also (but not because of this) had the gearbox oil changed (on mileage). NO repition until about a month ago when it happend twice in one week and then not since. The thought is, that it is a deep software problem caused by implausible signals but isn't actually a fault. Doesn't help I know in finding a cure, but my advice would be to clear the codes and fingers crossed....
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Old Nov 5, 2023 | 12:10 PM
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Originally Posted by The_Judge
Consider buying the module available on eBay and elsewhere that changes the default setting for ECO Start/Stop to OFF.

You can still activate the "feature" if for some unfathomable reason you want to by simply pressing the ECO button, and you can reverse the change so that ECO Start/Stop is again the default (i.e. automatically on when you start the car).
So far has never happened to me: 39,000 miles.

Some of us prefer not to pour additional and unnecessary CO2 into the atmosphere while at a stop light.

I would definitely take it back to the dealer: as this is part of emission control system the warranty period should be 80,000 miles.

Just my $.02
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Old Nov 5, 2023 | 03:18 PM
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Originally Posted by JTK44
So far has never happened to me: 39,000 miles.

Some of us prefer not to pour additional and unnecessary CO2 into the atmosphere while at a stop light.

I would definitely take it back to the dealer: as this is part of emission control system the warranty period should be 80,000 miles.

Just my $.02
Actually, the frequent restarting of the engine is overall worse for the environment. The ECO system was NOT developed to reduce emissions but to get a tiny increase in MPG for advertising purposes.
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Old Nov 5, 2023 | 03:40 PM
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Originally Posted by The_Judge
Actually, the frequent restarting of the engine is overall worse for the environment. The ECO system was NOT developed to reduce emissions but to get a tiny increase in MPG for advertising purposes.
Let me point out the obvious: better mpg, less fuel used: less fuel used less CO2 produced: an idling engine at a traffic burns fuel which produces CO2. An engine that is not running does not.

I get it: in this thread and others you have posted that you hate auto start.

But that does not change the fact that auto start not only improves mpg but is also better for the environment.


see: https://www.arrowheadmb.com/blog/doe...e-environment/

see: https://www.autoweek.com/news/techno...week-explains/

Last edited by JTK44; Nov 5, 2023 at 03:55 PM.
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Old Nov 5, 2023 | 03:53 PM
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The improvement in MPG is tiny, especially if you do a lot of freeway driving, and IMO doesn't justify the additional emissions or wear on the engine. YMMV
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Old Nov 5, 2023 | 04:01 PM
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Originally Posted by The_Judge
The improvement in MPG is tiny, especially if you do a lot of freeway driving, and IMO doesn't justify the additional emissions or wear on the engine. YMMV
To state the obvious if you driving on the freeway, auto start is not operating.

As to wear and stress, see thread #8 where these issues are discussed.

see: https://www.autoweek.com/news/techno...week-explains/

Sometimes facts get in the way of opinions!

.

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Old Nov 5, 2023 | 05:10 PM
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Originally Posted by The_Judge
The improvement in MPG is tiny, especially if you do a lot of freeway driving, and IMO doesn't justify the additional emissions or wear on the engine. YMMV
Increased MPG can be significant for those who mainly drive in a metro area. While doing my Saturday morning errands, I started a timer each time I was stationary in traffic including at stop lights. The results surprised me. The car ran for 3 hours and covered 54 miles as shown on the instrument cluster. The timer showed 45 minutes. I have no idea how much fuel an E300 uses at idle for 45 minutes, but it is more than a little. I appreciate the Start/Stop function, but it did not trigger once because of the A/C. I wish it worked the 11 months of the year when A/C is necessary.

Last edited by ua549; Nov 6, 2023 at 02:06 PM.
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Old Nov 6, 2023 | 07:50 AM
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Originally Posted by Mike1990
Hi everyone,

Newbie here.

I have a late 2018 e class estate that has been working well since ownership; however, the infamous ECO stop/start is causing me issues (which can be dangerous)

The issue is intermittent but happened twice yesterday (and a number of times over the last month). Essentially when ECO stop is engaged (green A) the engine fully cuts off and all lights on the dash come up (like when you press the start button once).

Been researching everywhere and cant seem to see whats the issue. Also had a diagnostic on the car two days ago which had some error codes cleared but as noted above the issue still happened yesterday.

Would be most grateful for any advice or suggestions.

Thank you
What was the error codes they cleared? I had this happened once to my last Mercedes 10 years ago, the car shut off and didn’t turn back on when I released the brakes. I had to put it in park and start the car manually. I also had the car check out but the dealer found nothing. Just wondering, how old is your battery, I am assuming the dealer did a load test on your battery.
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