E450 Auto Start Stop
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Junior Member
Joined: Jun 2014
Posts: 45
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2015 S550 Coupe
E450 Auto Start Stop
Hello good people,
Considering moving from a BMW G60 540i and before that a G30 to a E450 later this year. Looking forward building out a luxurious interior after the somewhat austere bimmers. Is it possible to turn auto start stop off permanently? If not, assuming I use the default drive mode and don't change to sport each time, is it one button each time you start the car? Do you have to go through screens or is it a hard button?
Considering moving from a BMW G60 540i and before that a G30 to a E450 later this year. Looking forward building out a luxurious interior after the somewhat austere bimmers. Is it possible to turn auto start stop off permanently? If not, assuming I use the default drive mode and don't change to sport each time, is it one button each time you start the car? Do you have to go through screens or is it a hard button?
MBWorld God!
Joined: Dec 2019
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Likes: 6,495
Hello good people,
Considering moving from a BMW G60 540i and before that a G30 to a E450 later this year. Looking forward building out a luxurious interior after the somewhat austere bimmers. Is it possible to turn auto start stop off permanently? If not, assuming I use the default drive mode and don't change to sport each time, is it one button each time you start the car? Do you have to go through screens or is it a hard button?
Considering moving from a BMW G60 540i and before that a G30 to a E450 later this year. Looking forward building out a luxurious interior after the somewhat austere bimmers. Is it possible to turn auto start stop off permanently? If not, assuming I use the default drive mode and don't change to sport each time, is it one button each time you start the car? Do you have to go through screens or is it a hard button?
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Joined: Jul 2025
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'24 E450
It took a week to get used to driving with the stop start enabled. The difference I found was that the car wouldn’t creep forward in the same way if I let my foot off the brake. I learned to lift my foot off the brake to get the car to move at an intersection for example.
It also occasionally turns off the engine as I’m pulling into a parking brake which results in the car slowing then lurching forward a few inches as it restarts the engine.
It also occasionally turns off the engine as I’m pulling into a parking brake which results in the car slowing then lurching forward a few inches as it restarts the engine.
MBWorld God!
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It took a week to get used to driving with the stop start enabled. The difference I found was that the car wouldn’t creep forward in the same way if I let my foot off the brake. I learned to lift my foot off the brake to get the car to move at an intersection for example.
It also occasionally turns off the engine as I’m pulling into a parking brake which results in the car slowing then lurching forward a few inches as it restarts the engine.
It also occasionally turns off the engine as I’m pulling into a parking brake which results in the car slowing then lurching forward a few inches as it restarts the engine.
As the W214 first does regen brake before physical brakes, if I recalled correctly, it does physical brake and regen brakes regardless at gear 1,2,3 etc. When it does regen brake at say higher gear, gear 7, you will notice the "charge" bar is at max.
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Joined: Jun 2024
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From: DFW Texas
GL450, E450, Porsche 718 GTS
On the 450, the engine does not have a traditional starter but uses the starter/generator inside the bell housing, thus you hardly even notice the on/off at stop lights. Also, the a/c compressor is electrically driven so you still have cool air while sitting at a stop on a hot day. I find it a non-issue as compared to other models that have a traditional starter.
Last edited by Hicksra; Apr 16, 2026 at 11:45 AM.
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2026 E53 wagon
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Member
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Some and I am one of them, believe start stop on a vehicle can reduce the reliability of the vehicle and also do not like it...I know quickly when I forgot to disable it on my CLE 53.
Some MB models you can program the car to send a message on the MBUX screen to tap to disable stop start. If you do not have that option you can create a routine.
Some MB models you can program the car to send a message on the MBUX screen to tap to disable stop start. If you do not have that option you can create a routine.
MBWorld Fanatic!
Joined: Jul 2004
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^ That's flawed thinking with this generation of engines. These cars do not have a starter motor to wear out. Idling is more wear on an engine than having it off.
Of course it is, but didn't want to go there as many think start/stop is a political issue.
Of course it is, but didn't want to go there as many think start/stop is a political issue.
Last edited by Alan Smithee; Apr 16, 2026 at 02:45 PM.
Super Member
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From: New York, NY
2026 E53 wagon
this is just old fashioned thinking and lack of understanding - same people that want to disable the radar cruise control in favor of the old fashioned cruise.
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Joined: Dec 2015
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From: Suburban Maryland
2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
May be irrational, but I just don't like stop start function. Maybe time to rethink this. But it is easy to disable after start, one push button. And it becomes automatic part of routine. And then flick another switch to dynamic function for the day, either sport or individual. This is on w213 E450. You can pay someone to disable through software if you don't care about your warantee. Any changes to ecu no matter how minor, marks your car as ineligible for coverage
Last edited by smiles201; Apr 16, 2026 at 10:28 PM.
Super Member
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From: Suburban Maryland
2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
Yes, I stand corrected. The law is that any modification would have to affect the system you are having a problem with to deny coverage. But .... the dealer decides what is covered, and if you are denied for any reason you have little recourse besides trying another dealer. I would not want to be in this position with a dealer. If you do your own maintenance be sure to have extensive records.
Newbie
Joined: Apr 2026
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From: Burbs of chicago
2025 mercedes benz e450 w214
I can tell a huge difference. If I forget to turn it off I know immediately after the light turns green. So far this car is great... The only thing I dislike is this auto start stop.. I don't care if something wears out faster or uses more gas... When I hit the gas I want to move.... I keep waiting for someone to add the w214 to the list of mods that shut it off.
MBWorld Fanatic!
Joined: Aug 2014
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From: Tennessee
W214 E450
I can tell a huge difference. If I forget to turn it off I know immediately after the light turns green. So far this car is great... The only thing I dislike is this auto start stop.. I don't care if something wears out faster or uses more gas... When I hit the gas I want to move.... I keep waiting for someone to add the w214 to the list of mods that shut it off.
MBWorld God!
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Older MB models you can simply disable auto start/stop by removing the battery sensor where the battery is, not sure about the W214 and not sure if there are other side effects of doing so. https://mbworld.org/forums/c-class-w...tart-stop.html
I recommend going the coding route instead.
I recommend going the coding route instead.
Newbie
Joined: Apr 2026
Posts: 8
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From: Burbs of chicago
2025 mercedes benz e450 w214
The 3rd party coders all have this service to permanently disable it. It's a bit expensive for what it is, but I do not remember the actual cost. Maybe it came down since I last looked. I've gotten into the habit of turning it off immediately after starting the car. If I forget, I'm reminded the first time it shuts off. I hate this feature and the fact that as an owner of the car I do not have the option of setting the default behavior to off.
