SL/R231: Auto shut-off to save petrol
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Joined: Feb 2017
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2017/sl-400
Auto shut-off to save petrol
Good day
I am a little confused by the reason of auto engine turn off/restart at traffic lights.
Mechanical/electro-mechanical devices have life time mainly based on the cycles while in service.
when I leave this option activated a single trip for the car could mean 20 or more off/on cycles for the starter motor and other components compared to a single cycle if the auto shut-off is disabled.
is there any study that shed the lite on how much fuel savings a car accomplish during 10 years or whatever.
The second question how do I make the default of this option off. Currently every time I manually turn it off it comes back on after new ignition
Edit : After searching I found many articles supporting the fuel saving claim.
Now the remaining question is how to make the default to be off.
Thanks
I am a little confused by the reason of auto engine turn off/restart at traffic lights.
Mechanical/electro-mechanical devices have life time mainly based on the cycles while in service.
when I leave this option activated a single trip for the car could mean 20 or more off/on cycles for the starter motor and other components compared to a single cycle if the auto shut-off is disabled.
is there any study that shed the lite on how much fuel savings a car accomplish during 10 years or whatever.
The second question how do I make the default of this option off. Currently every time I manually turn it off it comes back on after new ignition
Edit : After searching I found many articles supporting the fuel saving claim.
Now the remaining question is how to make the default to be off.
Thanks
Last edited by chromJ; Feb 23, 2017 at 05:36 AM. Reason: I found plenty of articles talking about this topic after searching.
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From: Houston, Texas
2017 SL550 Iridium Silver/Bengal Red, 2017 S550 Coupe Obsidian Black/Crystal Grey
You can't permanently turn it off on the SL. It defaults back to on when you turn off the car and you have to hit the button every time you start the car. Pretty annoying.
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From: Brookshire, Texas & Cat Spring, Texas
2019 SL550/2023 EQS 580 SUV
The theory is that if you have 10 million engines turn off, for example, 30 seconds at each stop light you save 5 million minutes of engine run time at each of those stop lights millions of times a day around the planet. You personally may not see much gas savings but when you add up many vehicles stopping continuously the savings are huge. Though the over ride on my 2017 SL450 only works for 4 stops at least I have a tiny bit of control. My wife's new Cadillac has no option at all and the engine turns off at every stop.
PS- I wonder how many starter motors will be replaced after just a few years or if modern technology will keep them usable for extended periods of years?
PS- I wonder how many starter motors will be replaced after just a few years or if modern technology will keep them usable for extended periods of years?
Last edited by Utopia Texas; Feb 23, 2017 at 08:59 PM.
Thread Starter
Junior Member
Joined: Feb 2017
Posts: 17
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2017/sl-400
The theory is that if you have 10 million engines turn off, for example, 30 seconds at each stop light you save 5 million minutes of engine run time at each of those stop lights millions of times a day around the planet. You personally may not see much gas savings but when you add up many vehicles stopping continuously the savings are huge. Though the over ride on my 2017 SL450 only works for 4 stops at least I have a tiny bit of control. My wife's new Cadillac has no option at all and the engine turns off at every stop.
PS- I wonder how many starter motors will be replaced after just a few years or if modern technology will keep them usable for extended periods of years?
PS- I wonder how many starter motors will be replaced after just a few years or if modern technology will keep them usable for extended periods of years?
Yes
Good point to think like mother earth.
I read while searching that they make the starter motor more robust. So theoritically it should last like a car that does not have the auto-shut off function.
It starts to make more sense after I searched.
Thanks
Thread Starter
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2017/sl-400
Thanks for the reply
Junior Member
Joined: Jul 2016
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From: Houston, Texas
2017 SL550 Iridium Silver/Bengal Red, 2017 S550 Coupe Obsidian Black/Crystal Grey
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From: Connecticut, USA
2017 SL450
I have this feature in my E550 and for the past 3 years have gotten quite used to it. Initially I didn't like it as I was always a little worried if the thing would start, when the light turned green, or when the traffic ahead of me moved. No problems with it, ever, and so I've acclimated. Won't even be an issue to me when the new SL comes next month.
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Thread Starter
Junior Member
Joined: Feb 2017
Posts: 17
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2017/sl-400
I have this feature in my E550 and for the past 3 years have gotten quite used to it. Initially I didn't like it as I was always a little worried if the thing would start, when the light turned green, or when the traffic ahead of me moved. No problems with it, ever, and so I've acclimated. Won't even be an issue to me when the new SL comes next month.
Thanks for replying
I am almost convinced after lots of research that the echo start/stop is a feasible feature.
I found this thread entertaining
https://mbworld.org/forums/e-class-w...p-feature.html
Today I decided not to disarm the feature. I find my self spending more time waiting at red light than driving.
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AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
If you ever drive in Sport mode, just select Sport Plus; that automatically de-selects ECO. On the '13-'16 models, Sport will do that...
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Super Moderator
Joined: May 2002
Posts: 10,544
Likes: 3,675
From: Land of 10,000 lakes
AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
I think you are right. Forgot. Our S-Class de-selects ECO by just pressing SPORT. Single Touch.
Last edited by Wolfman; Mar 20, 2017 at 09:37 PM.
