Do I Have a Battery Problem?
Thread Starter
Senior Member
Joined: May 2014
Posts: 485
Likes: 31
From: Concord, CA
'13 E350 . M276
Do I Have a Battery Problem?
I recently was trying to figure out how to reprogram my garage door opener, so fob was in ignition on position 2. This must have taken like 15 minutes, after which I did not start car. Next day when I started car, I got message in picture below. So, I just ignored it and it didn't came back.
Today, I was resetting service C, during which time I saw voltage was 11.9
Is this voltage reading a problem, or is it within range? Hope nothing is wrong with my battery. Is this voltage for "trunk battery?"
Today, I was resetting service C, during which time I saw voltage was 11.9
Is this voltage reading a problem, or is it within range? Hope nothing is wrong with my battery. Is this voltage for "trunk battery?"
Last edited by Stuttgarten; Nov 26, 2014 at 01:59 AM. Reason: Add Picture.
Super Member
Joined: Jan 2009
Posts: 511
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E55 AMG | Buell Lightning XB12
Maybe...? What's the voltage at idle, and cruising speed?
Maybe have a look here...
https://mbworld.org/forums/w211-amg/...orth-cost.html
Maybe have a look here...
https://mbworld.org/forums/w211-amg/...orth-cost.html
Thread Starter
Senior Member
Joined: May 2014
Posts: 485
Likes: 31
From: Concord, CA
'13 E350 . M276
Maybe...? What's the voltage at idle, and cruising speed?
Maybe have a look here...
https://mbworld.org/forums/w211-amg/...orth-cost.html
Maybe have a look here...
https://mbworld.org/forums/w211-amg/...orth-cost.html
MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
The only way I know of to get the voltage is to switch the display to temperature before starting and then hit the reset button three times. Then start the car, it will then display voltage while at idle and cruising speed. Don't know how else to get it once the car is started. Mine normally reads 11.9 volts, but my battery is about 7 years old at this stage. I think a fully charged battery is supposed to be in the 12.7v-12.8v range at 78 degrees.
Thread Starter
Senior Member
Joined: May 2014
Posts: 485
Likes: 31
From: Concord, CA
'13 E350 . M276
Thanks Cetialpha5, I just came back from a test drive and here are the numbers:
Voltage before starting engine: 11.8
Voltage after starting engine (Idle): 13.8
Voltage while driving: 14.0 - 14.1
Voltage after engine turned off: 12.4
If I take car to Auto Zone to test, which battery should they test, trunk or engine bay?
Voltage before starting engine: 11.8
Voltage after starting engine (Idle): 13.8
Voltage while driving: 14.0 - 14.1
Voltage after engine turned off: 12.4
If I take car to Auto Zone to test, which battery should they test, trunk or engine bay?
MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
Thanks Cetialpha5, I just came back from a test drive and here are the numbers:
Voltage before starting engine: 11.8
Voltage after starting engine (Idle): 13.8
Voltage while driving: 14.0 - 14.1
Voltage after engine turned off: 12.4
If I take car to Auto Zone to test, which battery should they test, trunk or engine bay?
Voltage before starting engine: 11.8
Voltage after starting engine (Idle): 13.8
Voltage while driving: 14.0 - 14.1
Voltage after engine turned off: 12.4
If I take car to Auto Zone to test, which battery should they test, trunk or engine bay?
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Thread Starter
Senior Member
Joined: May 2014
Posts: 485
Likes: 31
From: Concord, CA
'13 E350 . M276
Just for my peace of mind, I'll have an auto parts store check it, but thanks a lot for your input.
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From: Republic of Texas
'99 and '05 E55 AMG
Battery test standards - SAE CCA vs DIN vs EN vs JIS
FWIW, attached is a table comparing the amperage ratings of various standards to each other. Mercedes uses amperage (DIN), American batteries use SAE amperage (CCA), and the auxiliary Mercedes battery I just removed from my car was labeled 170A (EN). (JIS is a Japanese standard.)
Example, Mercedes training materials show the main battery being rated at 520A (DIN) which corresponds to a 900A (SAE) battery. Cold Cranking Amps (CCA) is the designation used by SAE.
Example, Mercedes training materials show the main battery being rated at 520A (DIN) which corresponds to a 900A (SAE) battery. Cold Cranking Amps (CCA) is the designation used by SAE.
Last edited by bbirdwell; Nov 27, 2014 at 10:43 PM.
