Engine start/stop mode a battery drainer?
Thread Starter
Senior Member
Joined: Nov 2015
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From: Boynton Beach. FL
2017 C300 Coupe, 2013 Cadillac ATS 2.0T
Engine start/stop mode a battery drainer?
Although I have the 2017 coupe, I'm asking this "battery" question of you guys because I don't think that the coupe has been around long enough to get an answer from the "coupe" forum.
I'm thinking that using the engine start/stop mode will drain the battery(ies) faster than if not used. For those that routinely use this function, what has been your experience?
I'm thinking that using the engine start/stop mode will drain the battery(ies) faster than if not used. For those that routinely use this function, what has been your experience?
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From: Miami, FL
2003 CL 600
The system uses the alternator to re-charge the batteries during coasting and when not using all the available engine power. It will not allow the start-stop fucntion to activate if the battery parameters are out of range (it actually checks about 80 different things in the car to allow ECO mode to stop the engine). It doesn't put much of a drain on the battery, as it works to recharge it harder than normal so it can use it to re-start the car. Regular use won't hurt the battery any, it's far better than deep discharging or overheating, both of which are monitored by the car and will prevent ECO mode stop-start if they get bad.
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2010 Subaru Legacy GT, 2014 Subaru Forester XT, 2002 Subaru Impreza WRX STI
I am worried about the start/stop effect on the batteries too, especially since I live in one of the more traffic infected cities in Asia. I guess I will find out when I get my car in a couple of weeks....
Thread Starter
Senior Member
Joined: Nov 2015
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From: Boynton Beach. FL
2017 C300 Coupe, 2013 Cadillac ATS 2.0T
Living here in SoFL with the A/C always running, my concern was that when the engine stopped and the A/C kept running, there was no way that the battery would not drain out. But as has been explained by ItalianJoe1, it seems that MB's engineering has everything in control.
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From: Miami, FL
2003 CL 600
Living here in SoFL with the A/C always running, my concern was that when the engine stopped and the A/C kept running, there was no way that the battery would not drain out. But as has been explained by ItalianJoe1, it seems that MB's engineering has everything in control.
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From: Manchester, UK
BMW e89 Z4 sDrive 35i & MB S205 C200 AMG Premium Plus
Living here in SoFL with the A/C always running, my concern was that when the engine stopped and the A/C kept running, there was no way that the battery would not drain out. But as has been explained by ItalianJoe1, it seems that MB's engineering has everything in control.
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From: Miami, FL
2003 CL 600
Soon, as the 42v systems come out, you will see a switch to hybrid style electrical compressors, so the a/c will run full blast even with the engine off.
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From: Miami, FL
2003 CL 600
A hybrid or electric car uses an electric motor to drive the a/c compressor instead of a belt on the engine. It's easy in that application because you already have a high-voltage electrical system than can run a strong, efficient electric motor to run the compressor. A standard 12V DC motor would be very large, heavy, and not efficient at all in that application.
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2016 C300
the only thing i would be worried about is when the car is out of warranty.
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
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Joined: Jan 2016
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Benz
the only thing i would be worried about is when the car is out of warranty.
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
I have the same worry.
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Joined: May 2015
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From: Miami, FL
2003 CL 600
the only thing i would be worried about is when the car is out of warranty.
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
As we see the last generation of cars falling out of warranty and extended/CPO warranty, the quotes are horrifying. A single control unit for a small sub-system can be $1500 and there's no guarantee it will solve the problem. The diagnostics are "replace control unit and re-test" type of things, but when the customer is paying for it and not MB, it gets expensive very quick.
Member
Joined: Sep 2005
Posts: 168
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2017 C300 Coupe (C205)
the only thing i would be worried about is when the car is out of warranty.
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
can you imagine how many things can go wrong on our cars after warranty period is over?
so much technology crammed in this car, i'm scared to even think about repair costs. German car electronics are bound to fail............
Just reminded me that the other day I got a notification on my dash that my rear seats weren't latched in place! I thought, wow that's cool, but just another a sensor that can fail...
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2020 GLC43
1st of all, start stop system requires a different class of battery to survive more charge/drain cycles.
2nd, there are conditions that Auto Start/Stop won't run. I have been driving in -20C all week and seat heater on full blast, Auto Start/Stop never stop my engine once.
AND don't keep German cars past warranty, unless you bought factory extended warranty. It's always good idea to lease Germans.
And hey, we have a Inline Six to look forward to in 2018 or 19 for those of us getting off lease.
http://jalopnik.com/mercedes-brings-...mar-1788404634
I'm looking forward to this getting into the 43 line of AMGs.
2nd, there are conditions that Auto Start/Stop won't run. I have been driving in -20C all week and seat heater on full blast, Auto Start/Stop never stop my engine once.
AND don't keep German cars past warranty, unless you bought factory extended warranty. It's always good idea to lease Germans.
And hey, we have a Inline Six to look forward to in 2018 or 19 for those of us getting off lease.
http://jalopnik.com/mercedes-brings-...mar-1788404634
So to recap: this 3.0-liter turbocharged inline-six, with its electric motor/generator, electric turbocharger, electric water pump and electric AC compressor, is a thoroughly advanced contraption that promises more than 408 horsepower and 370 lb-ft of torque.
The car gods have answered our prayers.
The car gods have answered our prayers.
