C219 CLS55 and CLS63, 2004-2010

looking for some help with my battery convenience fucion on my cls55

Old Oct 14, 2021 | 01:02 AM
  #1  
airbats801's Avatar
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cls55
looking for some help with my battery convenience fucion on my cls55

I'm trying to figure out what is causing this thing to go off. It started intermittently and now its on every time I drive the car. red battery light, convenience features turned off. It's getting annoying.

Both batteries are new, I just tried my friends e55 battery control module tonight thinking maybe that was the culprit, it wasn't. The alternator is a brand new oem bosch, about a month old. voltage runs about 13.9 when you do the triple click on the cluster before starting.

I went through and checked the voltage at the battery and trunk fuses, im running about 14.2. I also checked the high current relay for the aux. car off it was separated, and when I started the car I was seeing 14.1 which leads me to believe it is functioning as well.

I'm basically at a loss. What am I missing?
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Old Oct 14, 2021 | 09:23 AM
  #2  
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2006 CLS55 AMG, 2005 SLK 350 AMG
Originally Posted by airbats801
I'm trying to figure out what is causing this thing to go off. It started intermittently and now its on every time I drive the car. red battery light, convenience features turned off. It's getting annoying.

Both batteries are new, I just tried my friends e55 battery control module tonight thinking maybe that was the culprit, it wasn't. The alternator is a brand new oem bosch, about a month old. voltage runs about 13.9 when you do the triple click on the cluster before starting.

I went through and checked the voltage at the battery and trunk fuses, im running about 14.2. I also checked the high current relay for the aux. car off it was separated, and when I started the car I was seeing 14.1 which leads me to believe it is functioning as well.

I'm basically at a loss. What am I missing?
A couple of suggestions. It would be best if you had the car connected up to the MB Star diagnostic tool as it will provide you with much more needed information than the typical OBDII scanner. It will likely point to what is the battery issue(s). If you have not done a deep search on the forum then that is in order as everything has been dealt with at some level. You just need to find it. Also, in case you are not aware, since the CLS55 is the same car as the W211 E55 and there were many more of those produced you will get a lot more eyeballs looking at your posts in that section of the forum. Check it out: https://mbworld.org/forums/w211-amg-81/
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Old Oct 16, 2021 | 12:05 PM
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CLS55AMG
Same situation here

Hello, I am having the same alerts on my CLS55 except for red battery indicator. I just get the "battery low convenience features disabled" but they are not. For instance my dynamic seat still are in dynamic mode and function as are heated or cooled seat still work too. My message toggles multiple times while driving between the aforementioned and "convenience features available." Battery voltage on cluster says 14.1V. Both batteries are OEM MB and two years old now but always have tenders on them when not in use.
I am working on getting a STAR system together here. I do have a icarsoft MBII scanner I will set what I can pull with that.
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