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Old Apr 10, 2021 | 03:54 PM
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Auto start stop question

So I know there's lots of posts on this but I feel like my question is pretty unique, it maybe it isn't. My C43 that I ordered was supposed to come with the AMG drive unit, but it didn't, but it did come with the steering wheel dials, they just don't work. That's a whole other issue. Anyway, my start stop only works in comfort mode or individual with comfort selected. This is really annoying as I'd like to use it in individual with the economy mode or whatever it's called selected. I live in a very busy area and most of the time I'd like to save on gas and switching back and forth to comfort is really annoying. Is this how it works on everyone else's C43?
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Old Apr 10, 2021 | 04:10 PM
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Most people who drive an AMG rather want ECO start/stop be turned off permanently. It's the first thing I turn off after starting the engine, but to answer your question, yes, on these cars it's only active in C or *I with the Drive setting in Moderate. There is no ECO mode in these cars. The Drive mode Reduced, which I think is what you are referring to, is not an ECO mode. It's a mode for slippery conditions. It reduces the low end torque and gives a flatter torque curve to make it easier to drive and start driving on slippery roads.
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Old Apr 10, 2021 | 04:30 PM
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Originally Posted by superswiss
Most people who drive an AMG rather want ECO start/stop be turned off permanently. It's the first thing I turn off after starting the engine, but to answer your question, yes, on these cars it's only active in C or *I with the Drive setting in Moderate. There is no ECO mode in these cars. The Drive mode Reduced, which I think is what you are referring to, is not an ECO mode. It's a mode for slippery conditions. It reduces the low end torque and gives a flatter torque curve to make it easier to drive and start driving on slippery roads.
Thanks for the quick response. Yes,I was referring to reduced. What I like about it is it disconnects the drive and isles when you let off the gas and it definitely helps fuel economy. It's good to know it's working as expected, thanks. Trust me, I get on the gas and push it, but the other 90% of the time I'd like to get decent fuel economy sitting at lights half the drive.
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Old Apr 10, 2021 | 04:52 PM
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Originally Posted by ctsvette
Thanks for the quick response. Yes,I was referring to reduced. What I like about it is it disconnects the drive and isles when you let off the gas and it definitely helps fuel economy. It's good to know it's working as expected, thanks. Trust me, I get on the gas and push it, but the other 90% of the time I'd like to get decent fuel economy sitting at lights half the drive.
You are referring to the glide mode. That is active with both reduced and moderate in I*.
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Old Apr 10, 2021 | 04:59 PM
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Originally Posted by superswiss
You are referring to the glide mode. That is active with both reduced and moderate in I*.
Lol, yes, I just tried it and was pleasantly surprised. Thanks, I'm happy now.
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Old Apr 10, 2021 | 05:47 PM
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If you leased this car, fine, but I am sure as soon as warranty ends, all the multi clutch packs will worn out from constant disengaging and engagement of glide mode.

Also add lame eco start stop eventually destroying your starter. Battery and alternator too from unnecessary draining and charging at every stoplight
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Old Apr 10, 2021 | 07:04 PM
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Originally Posted by stockbmw
If you leased this car, fine, but I am sure as soon as warranty ends, all the multi clutch packs will worn out from constant disengaging and engagement of glide mode.

Also add lame eco start stop eventually destroying your starter. Battery and alternator too from unnecessary draining and charging at every stoplight
The clutch packs will be fine. They get re-engaged with the gear speeds synchronized, so there is practically no wear. Far less than the wear normal shifting produces. Clutch wear occurs when the two sides rotate at different speeds, so that's where rev matching comes in to minimize this wear. The C43 as opposed to the C63 also has a torque converter, but even so in the C63 the transmission and engine speeds are matched before the clutch is re-engaged if you do use glide mode. I never use it, though.

I do have my thoughts on ECO start/stop, especially as in the real world it often seems to unnecessarily turn off the engine, just to restart it a second or two later. In order to actually save fuel with ECO start/stop, you need to be stopped for about 7 seconds before there is a net gain. Jason from EE did a nice video on it. Otherwise you actually end up using more fuel due to the constant re-firing of the engine that uses more fuel than just idling it. The jury is out on the long term viability of using ECO start/stop, but hybrid cars for example turn their engines off and on constantly and you may even end up flooring it when it is cold if it hasn't run much yet and suddenly you are asking for power to accelerate. A bit of an issues with hybrid is also the break-in of the combustion engine. It's not broken in by the time the car has reached the break-in mileage, but rather when the engine has been used for enough miles, but that's a bit of a different topic. I think if you drive a lot in traffic and the city, then a PHEV makes a lot more sense, so that for most of this low speed stop and go driving you'll be driving in electric mode and avoid constantly starting and stopping the engine.

Last edited by superswiss; Apr 10, 2021 at 07:08 PM.
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Old Aug 2, 2021 | 05:48 PM
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Originally Posted by ctsvette
So I know there's lots of posts on this but I feel like my question is pretty unique, it maybe it isn't. My C43 that I ordered was supposed to come with the AMG drive unit, but it didn't, but it did come with the steering wheel dials, they just don't work. That's a whole other issue. Anyway, my start stop only works in comfort mode or individual with comfort selected. This is really annoying as I'd like to use it in individual with the economy mode or whatever it's called selected. I live in a very busy area and most of the time I'd like to save on gas and switching back and forth to comfort is really annoying. Is this how it works on everyone else's C43?
I'm sorry if I come across as smart but who buys a c43 AMG and trys to save on gas
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Old Aug 2, 2021 | 09:56 PM
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the c43 doesnt have eco mode, at least my 2020 doesnt. also by default i think it starts in comfort?
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Old Feb 12, 2024 | 04:48 PM
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Can someone help me

Originally Posted by ctsvette
So I know there's lots of posts on this but I feel like my question is pretty unique, it maybe it isn't. My C43 that I ordered was supposed to come with the AMG drive unit, but it didn't, but it did come with the steering wheel dials, they just don't work. That's a whole other issue. Anyway, my start stop only works in comfort mode or individual with comfort selected. This is really annoying as I'd like to use it in individual with the economy mode or whatever it's called selected. I live in a very busy area and most of the time I'd like to save on gas and switching back and forth to comfort is really annoying. Is this how it works on everyone else's C43?

Somebody can help me ?
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