Stop/Start system
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Newbie
Joined: Dec 2021
Posts: 9
Likes: 3
From: Mackay, Queensland, Australia
GLE350d
Stop/Start system
Hi all. I've had my pre-owned 350 for about 10 months now. The auto stop/start worked, but now it doesn't. Its used as my wifes daily drive, but the stop/start doesn't work. All I get is the slashed yellow 'A' symbol. I've tried the dash switch, to no avail. Any help would be welcomed.
Super Member
Joined: Nov 2007
Posts: 501
Likes: 138
From: Washington D.C. area
16 GLE400 4matic
Did you try pushing the ECO button. If it lights green then it's active. Or you may have issue with the main vehicle battery.
Last edited by amusa; Aug 19, 2022 at 05:56 AM.
Out Of Control!!
Joined: Sep 2018
Posts: 14,695
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From: unbegrenzt
2017 GLE350 4MATIC
Hi all. I've had my pre-owned 350 for about 10 months now. The auto stop/start worked, but now it doesn't. Its used as my wifes daily drive, but the stop/start doesn't work. All I get is the slashed yellow 'A' symbol. I've tried the dash switch, to no avail. Any help would be welcomed.
Out Of Control!!
Joined: Sep 2018
Posts: 14,695
Likes: 4,586
From: unbegrenzt
2017 GLE350 4MATIC
With a 2016, the batteries could be as be as old as 7 years. You are overdue to replace both batteries.
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2019 s-class coupe 2025 GLS 580 SUV2017 S-class cabriolet
I have a 2018, GLE 350,2WD and I have neither A, ECO buttons or stop/start.
So can assume the stop/start systems is NOT installed in my vehicle!!!!
ANYONE! ANYONE!!!
So can assume the stop/start systems is NOT installed in my vehicle!!!!
ANYONE! ANYONE!!!
Last edited by ron104; Aug 20, 2022 at 09:57 AM.
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Out Of Control!!
Joined: Sep 2018
Posts: 14,695
Likes: 4,586
From: unbegrenzt
2017 GLE350 4MATIC
GLE400, GLE43 with gasoline 3.0L TT V6 had start/stop.
Member
Joined: Apr 2021
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From: Mitchell, SD, U.S.
2016 GLE 300d 4-Matic
There are also fuses F212 (7.5A) and F240 (30A) for the stop/start system in the engine compartment fuse panel that you could check.
Edit - for some reason the images I uploaded yesterday showing the fuse locations aren't showing properly and I can't get them to show properly. Hopefully you'll be able figure those out.
Last edited by John Ha; Aug 22, 2022 at 07:17 AM.
Super Member
Joined: Nov 2007
Posts: 501
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From: Washington D.C. area
16 GLE400 4matic
Junior Member
Joined: Jan 2013
Posts: 43
Likes: 11
From: Canada & Florida
2016 GLE 350d Coupe
Hi all. I've had my pre-owned 350 for about 10 months now. The auto stop/start worked, but now it doesn't. Its used as my wifes daily drive, but the stop/start doesn't work. All I get is the slashed yellow 'A' symbol. I've tried the dash switch, to no avail. Any help would be welcomed.
If you turn it off every time it stops automatically, at some point it will no longer stop in Auto Mode (for ECO purposes)
It appears to have a 'learning' feature. Mine did that too and was reset after I changed the battery
Member
Joined: Feb 2006
Posts: 90
Likes: 3
From: US
EQE350 4MATIC
My US 2016 GLE300d's stop start does not work (recently purchased). It has a green "A" light on, but when turning it it off, nothing changes in the center console (e.g. no amber A with the strikethrough). Is it likely the Aux or regular battery? Or maybe the previous owner disabled it somehow?
Last edited by harperb; Feb 18, 2024 at 01:45 AM.
MBWorld Fanatic!
Joined: Jan 2009
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From: V E G A S
1922 Ford Model T / no OBD
My US 2016 GLE300d's stop start does not work (recently purchased). It has a green "A" light on, but when turning it it off, nothing changes in the center console (e.g. no amber A with the strikethrough). Is it likely the Aux or regular battery? Or maybe the previous owner disabled it somehow?
At the time I could not get definite answer on the forum, so assumed the car doesn't have the option.
So year + after purchase, the original battery gave up and I replaced. it.
ECO stop engaged on 1st red light after.....
The aux battery on those cars is very small, so I assume it powers parking brake and gear shifter only in emergency.
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From: DFW
SL63
That autostart feature is very misleading. It lures you into the idea that you are saving fuel, and thus reducing emissions. It also lulls you into believing you are being more economical.
Scotty Kilmer hates autostart. Very hard on the starter, and reduces starter life significantly. Hard on the batteries as well. Also hard on turbo chargers.
I have the option for switching it off, and I always do.
I seem to remember a study performed on the question of shutting off the engine while stopped.
To the best of my recollection it was 1 or 2 minutes was the break even.
Scotty Kilmer hates autostart. Very hard on the starter, and reduces starter life significantly. Hard on the batteries as well. Also hard on turbo chargers.
I have the option for switching it off, and I always do.
I seem to remember a study performed on the question of shutting off the engine while stopped.
To the best of my recollection it was 1 or 2 minutes was the break even.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
That autostart feature is very misleading. It lures you into the idea that you are saving fuel, and thus reducing emissions. It also lulls you into believing you are being more economical.
Scotty Kilmer hates autostart. Very hard on the starter, and reduces starter life significantly. Hard on the batteries as well. Also hard on turbo chargers.
I have the option for switching it off, and I always do.
I seem to remember a study performed on the question of shutting off the engine while stopped.
To the best of my recollection it was 1 or 2 minutes was the break even.
Scotty Kilmer hates autostart. Very hard on the starter, and reduces starter life significantly. Hard on the batteries as well. Also hard on turbo chargers.
I have the option for switching it off, and I always do.
I seem to remember a study performed on the question of shutting off the engine while stopped.
To the best of my recollection it was 1 or 2 minutes was the break even.
When it might shorten the battery life by small %, the biggest battery killer is "smart charging".
Good luck with listening to Scotty with MB ownership.
Senior Member
Joined: Feb 2016
Posts: 343
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From: Chicago, U.S.A.
2016 GLE 350 4-Matic
I found a very good technical answer to your question on line…"
Automotive engineers don't use 'traditional' starter motors in these situations," he explained. "The starter used for start-stop systems combines several technologies."
What follows is his explanation of those technologies, lightly edited by Green Car Reports for clarity and style.
(1) The gear ratio from the starter-drive pinion to the flywheel ring gear is optimized to make the starter's motor turn more slowly. This can be done without materially changing the design of the transmission or flywheel at all on existing
Crucially, this reduces starter-motor speed (in RPM), since 90 percent of starter-motor brush wear occurs not during cranking, but during the coast-down after the start has finished. If a higher-torque motor can spin more slowly, its coast-down time is shorter, increasing its longevity.
(2) The composition of the carbon and copper brushes on a start-stop motor differs from its traditional counterparts to increase longevity without accelerating the wear on the commutator.
(3) Rather than rely on oil-impregnated bushings for the rotating assemblies, start-stop starters mostly use needle bearings.
(4) The solenoid on start-stop starters decouples the mechanical action of engaging the drive pinion into the flywheel from the electrical action of stopping and starting the motor.
This allows for a dedicated design to turn power on and off to the motor, optimizing contact design and wear, against contacts that have to be integrated as part of a spring-loaded plunger.
This also reduces the electrical load requires to turn the engine, so that there is enough current available for accessories/lighting to operate during the start event.
(5) Finally, start-stop motors are integrated with other technologies that identify when each cylinder of the engine will reach top-dead center.
That lets the fuel injectors pulse and fire during the middle of a complete rotation of the crank, against having to wait for a complete revolution that lets the first cylinder reach that position to start the fuel-spark timing sequence.
And there you have it: the full technical explanation of why you don't need to worry about starter motors wearing out prematurely due to start-stop systems.
Automotive engineers don't use 'traditional' starter motors in these situations," he explained. "The starter used for start-stop systems combines several technologies."
What follows is his explanation of those technologies, lightly edited by Green Car Reports for clarity and style.
(1) The gear ratio from the starter-drive pinion to the flywheel ring gear is optimized to make the starter's motor turn more slowly. This can be done without materially changing the design of the transmission or flywheel at all on existing
Crucially, this reduces starter-motor speed (in RPM), since 90 percent of starter-motor brush wear occurs not during cranking, but during the coast-down after the start has finished. If a higher-torque motor can spin more slowly, its coast-down time is shorter, increasing its longevity.
(2) The composition of the carbon and copper brushes on a start-stop motor differs from its traditional counterparts to increase longevity without accelerating the wear on the commutator.
(3) Rather than rely on oil-impregnated bushings for the rotating assemblies, start-stop starters mostly use needle bearings.
(4) The solenoid on start-stop starters decouples the mechanical action of engaging the drive pinion into the flywheel from the electrical action of stopping and starting the motor.
This allows for a dedicated design to turn power on and off to the motor, optimizing contact design and wear, against contacts that have to be integrated as part of a spring-loaded plunger.
This also reduces the electrical load requires to turn the engine, so that there is enough current available for accessories/lighting to operate during the start event.
(5) Finally, start-stop motors are integrated with other technologies that identify when each cylinder of the engine will reach top-dead center.
That lets the fuel injectors pulse and fire during the middle of a complete rotation of the crank, against having to wait for a complete revolution that lets the first cylinder reach that position to start the fuel-spark timing sequence.
And there you have it: the full technical explanation of why you don't need to worry about starter motors wearing out prematurely due to start-stop systems.
