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ECO Start/Stop...how it works

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Old Aug 21, 2013 | 07:37 PM
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ECO Start/Stop...how it works

New owner here. I kinda like this feature. The MB Sales guy told me this feature "does not use the starter. But releases an electric charge into the cylinder that has the piston which is positioned ready to start." My response was..."So, you mean to tell me that it uses a capacitive discharge type of system?" He said, "Yeah that is exactly it. When you release the brake, the electronic system send a charge to the system to start that cylinder." But my question is..." is that really the way it works?

I did a search. And the best I can come up with is that the system uses a "Starter assist"...What the heck does that mean?

This is a great forum with many well informed folks. I am glad to be a new member.

Last edited by Vulcaneer; Aug 21, 2013 at 07:40 PM.
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Old Aug 21, 2013 | 11:59 PM
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Originally Posted by Vulcaneer
New owner here. I kinda like this feature. The MB Sales guy told me this feature "does not use the starter. But releases an electric charge into the cylinder that has the piston which is positioned ready to start." My response was..."So, you mean to tell me that it uses a capacitive discharge type of system?" He said, "Yeah that is exactly it. When you release the brake, the electronic system send a charge to the system to start that cylinder." But my question is..." is that really the way it works?

I did a search. And the best I can come up with is that the system uses a "Starter assist"...What the heck does that mean?

This is a great forum with many well informed folks. I am glad to be a new member.
Interested in this also...
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Old Aug 22, 2013 | 12:12 AM
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The system uses the starter motor, its not more exotic than that unfortunately.
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Old Aug 22, 2013 | 08:11 AM
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Thanks for the reply. I really had to wonder, since when ECO starts the motor, I really don't hear the starter motor. As I do when starting normally with the key. Since the system has been out a few years, has anyone heard of premature wear or failure on the starter motor?
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Old Aug 22, 2013 | 12:28 PM
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I hate ECO and wish I could turn it completely off.
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Old Aug 22, 2013 | 01:50 PM
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I found this on the web for the CLS in 2010. So it is probably how it works in the W204. It isn't just the starter, but it does say the starter has been designed to withstand 8x the number of starts as before.

http://media.daimler.com/dcmedia/0-9...0-0-0-0-0.html
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Old Aug 22, 2013 | 05:28 PM
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Originally Posted by Ron Jr
I hate ECO and wish I could turn it completely off.
I wanted to hate it, but could not find a reason to. I can't see how you would possibly have a problem with it.
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Old Aug 22, 2013 | 06:37 PM
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I find the system to be somewhat erratic as far as when it chooses to turn off as well as having some engine vibration upon shut-off. I don't like it at all.
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Old Aug 22, 2013 | 10:59 PM
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To much hesitation on the restart. So as soon as I start the car off it goes.
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Old Aug 22, 2013 | 11:29 PM
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I will not buy a Mercedes, or any car for that matter, that has this absurd Eco start feature, whether by any other name. This is a manifestation of the Kool Aid drinkers gone completely 'round the bend. Yes, I'm aware of the arguments in its favor, and I reject all of them. Yes, I drove an MB with it and do not like it at all.
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Old Aug 23, 2013 | 09:02 AM
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Originally Posted by stratman1954
I find the system to be somewhat erratic as far as when it chooses to turn off as well as having some engine vibration upon shut-off. I don't like it at all.
I really want to like this feature, but when it shuts off the car when it is 95º and turns off the a/c and it doesn't shut down the car when it is 75º and I have then windows down and the A/C off it becomes very easy to dislike the system.
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Old Aug 23, 2013 | 12:09 PM
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Originally Posted by fordracefan
I really want to like this feature, but when it shuts off the car when it is 95º and turns off the a/c and it doesn't shut down the car when it is 75º and I have then windows down and the A/C off it becomes very easy to dislike the system.
Doesn't it shut off the engine but A/C still runs?? that's how it is with my mother's E class.

I always switch it off whenever I drive her car anyways, not the ECO type of guy
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Old Aug 23, 2013 | 12:30 PM
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Originally Posted by Gashde
Doesn't it shut off the engine but A/C still runs?? that's how it is with my mother's E class.

I always switch it off whenever I drive her car anyways, not the ECO type of guy
On my 2012 the A/C kicks off but the fan keeps blowing.
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Old Aug 25, 2013 | 06:35 PM
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Agree, sometimes erratic. But I don't really care. Sometimes it shuts off sometimes it does not. Am sure it has it's reasons for it's behavior. I like when it shuts off and all is quiet. Of course, in New Hampshire so when the A/C goes off...not a big deal.
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Old Aug 25, 2013 | 06:39 PM
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Originally Posted by Vulcaneer
Agree, sometimes erratic. But I don't really care. Sometimes it shuts off sometimes it does not. Am sure it has it's reasons for it's behavior. I like when it shuts off and all is quiet. Of course, in New Hampshire so when the A/C goes off...not a big deal.
This is exactly how I feel. It's difficult to notice when the engine turns off or on, so it makes no difference to me if the feature is meeting its parameters to be enabled/disabled.
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Old Aug 26, 2013 | 10:43 AM
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Originally Posted by Ron Jr
I hate ECO and wish I could turn it completely off.
I hate it as well...I can feel it turning on and off, also don't like that the engine isn't running at all times. Really annoying and not worth the little bit of extra savings on gas.

Fortunately, I have to push only one button to turn it off...part of my startup routine.

BTW, this is my first post here - hello everyone!
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