Start problems in cold weather w221 S63 HELP please
Thread Starter
Newbie
Joined: Jan 2024
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W221
Start problems in cold weather w221 S63 HELP please
Hello. I am having problems with my W221 S63 2010.. on the summer time, the car starts and runs perfectly fine, but when the weather becomes colder alot of warning lights show up on the dashboard.. countless faultcodes and errors, cant put the car in any gear either.
Then when i disconnect the negative pole and wait for a few minutes and connect it again it starts no problems.
then Once again the next day the same again. Could you please help me with this, any tips would be highly appreciated.
Then when i disconnect the negative pole and wait for a few minutes and connect it again it starts no problems.
then Once again the next day the same again. Could you please help me with this, any tips would be highly appreciated.
MBWorld Fanatic!
Joined: Aug 2014
Posts: 5,315
Likes: 1,672
S500
that's not a normal issue
I'd fit a new small 'motorbike' battery inside under the dash - and double check the main battery
https://www.youcanic.com/2008-2013-m...y-replacement/
I'd fit a new small 'motorbike' battery inside under the dash - and double check the main battery
https://www.youcanic.com/2008-2013-m...y-replacement/
Thread Starter
Newbie
Joined: Jan 2024
Posts: 7
Likes: 0
W221
that's not a normal issue
I'd fit a new small 'motorbike' battery inside under the dash - and double check the main battery
https://www.youcanic.com/2008-2013-m...y-replacement/
I'd fit a new small 'motorbike' battery inside under the dash - and double check the main battery
https://www.youcanic.com/2008-2013-m...y-replacement/
hello. Thank you for the tip, i have replaced the auxilary battery and new main battery. Still same?
Super Member
Joined: Dec 2018
Posts: 857
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From: Washington, DC
2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
This definitely sounds voltage related. I would charge the battery fully (my 2007 S600 has both a starter battery and a consumer battery). I don't think the 2010 has a consumer battery in the back; but if you do, that also needs to be fully charged. Then I would measure in volts before start. You need at least 12.0 volts pre-start. After start, and after 20 minutes of running, measure volts again and this time while running you should have 14.5 volts. If not, your serpentine belt is loose or your alternator is fading fast.
Please report back your findings. A W221 is not happy with low voltage. It will do crazy things as it shuts down sub-systems trying to conserve power.
Please report back your findings. A W221 is not happy with low voltage. It will do crazy things as it shuts down sub-systems trying to conserve power.
Thread Starter
Newbie
Joined: Jan 2024
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W221
Thread Starter
Newbie
Joined: Jan 2024
Posts: 7
Likes: 0
W221
This definitely sounds voltage related. I would charge the battery fully (my 2007 S600 has both a starter battery and a consumer battery). I don't think the 2010 has a consumer battery in the back; but if you do, that also needs to be fully charged. Then I would measure in volts before start. You need at least 12.0 volts pre-start. After start, and after 20 minutes of running, measure volts again and this time while running you should have 14.5 volts. If not, your serpentine belt is loose or your alternator is fading fast.
Please report back your findings. A W221 is not happy with low voltage. It will do crazy things as it shuts down sub-systems trying to conserve power.
Please report back your findings. A W221 is not happy with low voltage. It will do crazy things as it shuts down sub-systems trying to conserve power.
also the car does not have OEM main battery, i have tried several batteries But same outcome. Havent tried oem battery though
Last edited by Mechanic13; Jan 2, 2024 at 05:45 PM.
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MBWorld Fanatic!
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S500
CCA cold cranking amps - check out those values on the std battery vs ones you have used
certain types often decent AGM batteries (AKA the stock one) can push out 50 to 100% more grunt for cranking
AGM (absorbed glass matting) was designed for the military to take abuse and rapid charge and discharge
on the earlier ones (pre 2007 mini facelift) they get a 25kg monster stop start battery in the boot (it sits behind the rear seats) - they never had stop start
stop start is shorthand for - ridiculous current demand and massive abuse
certain types often decent AGM batteries (AKA the stock one) can push out 50 to 100% more grunt for cranking
AGM (absorbed glass matting) was designed for the military to take abuse and rapid charge and discharge
on the earlier ones (pre 2007 mini facelift) they get a 25kg monster stop start battery in the boot (it sits behind the rear seats) - they never had stop start
stop start is shorthand for - ridiculous current demand and massive abuse
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Member
Joined: May 2023
Posts: 96
Likes: 53
From: California
2019 Mercedes S560
Hey there,
Even though you said you just got new batteries, they may be faulty. Even if it's just a few amps off the car freaks out. I just went through two batteries from the dealer since the first was not working to start the car.
Some other generic stuff I'm sure you've already tried,
-Check out the alternator just in case, that way you can rule it out (although It does not sound like it's related to the problem).
-And if you're not starting the car at least every other day make sure to get a trickle charger for it, again W211's and pretty much most German cars are VERY sensitive to voltage and do crazy things when its not exactly what the car wants.
The fact that this happens only in certen conditions makes me think it's most likely not mechanically related, more electrical. Ive found with Mercedes specifically that mechanically (most of the time) they are very reliable when maintained, but the electrical and silly stuff like that causes problems.
Even though you said you just got new batteries, they may be faulty. Even if it's just a few amps off the car freaks out. I just went through two batteries from the dealer since the first was not working to start the car.
Some other generic stuff I'm sure you've already tried,
-Check out the alternator just in case, that way you can rule it out (although It does not sound like it's related to the problem).
-And if you're not starting the car at least every other day make sure to get a trickle charger for it, again W211's and pretty much most German cars are VERY sensitive to voltage and do crazy things when its not exactly what the car wants.
The fact that this happens only in certen conditions makes me think it's most likely not mechanically related, more electrical. Ive found with Mercedes specifically that mechanically (most of the time) they are very reliable when maintained, but the electrical and silly stuff like that causes problems.
Junior Member
Joined: Jan 2022
Posts: 49
Likes: 21
From: North Carolina
2011 E63 AMG, 2007 S550 AMG
While you’ve changed the main and starter batteries, as a couple of people have mentioned, since they are not OEM, you need to make sure they have adequate CCA for their intended use. Another possibility as someone else mentioned is a mildly defective battery that while rated to meet/exceed the CCA requirement, does not achieve the CCA rating at colder temps. One other obvious thing that I’ll mention that hasn’t been discussed is the need for clean and tight terminal connections with each battery. Since you’ve changed both batteries, the assumption is this is not an issue, but wanted to point it out. Connection resistance and battery strength is only exacerbated with cold temps so make sure those connections are shiny and clean before assembly.
Good luck!
Pete
Good luck!
Pete
Newbie
Joined: Dec 2024
Posts: 1
Likes: 0
S63
Hello. I am having problems with my W221 S63 2010.. on the summer time, the car starts and runs perfectly fine, but when the weather becomes colder alot of warning lights show up on the dashboard.. countless faultcodes and errors, cant put the car in any gear either.
Then when i disconnect the negative pole and wait for a few minutes and connect it again it starts no problems.
then Once again the next day the same again. Could you please help me with this, any tips would be highly appreciated.
Then when i disconnect the negative pole and wait for a few minutes and connect it again it starts no problems.
then Once again the next day the same again. Could you please help me with this, any tips would be highly appreciated.
Did you figure out the problem with your 2010 s63? im having the same problem if you have any tips on this i appreciate it very
