E-Class (W211) 2003-2009

How to reset comfort settings disabled?

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Old Oct 9, 2009 | 02:31 PM
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Mackhack's Avatar
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How to reset comfort settings disabled?

Hi,

could someone tell me how to reset the CI Display with the warning "Battery protection, comfort functions temporarily switched off"? I left the light on yesterday evening for about 4 hours. I drove home then for about 30 minutes a few things came back on such as the cigarette lighter and such. I checked voltage on the battery (12.3V) through my CI Display but the message didn't go away.

Thank you!
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Old Oct 9, 2009 | 02:43 PM
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04 E320 4 Matic, 95 Audi S6, 99 Carrera 4 Cabrio, 12 Fiat 500 Sport, 00 BMW R1200C 10, BMW R1200R
My understanding is that it is supposed to go away on its own once the voltage goes up. If you were reading 12.3 V when the engine was running, it is still too low for the accessories to turn back on. I don’t think that there should be below 13.6 V in the system when the engine is running. You might have a short circuit in your battery (one of the two) that is preventing the system from fully charging it. Or. . . you might have a problem in the charging system of the car.

Tell us what it is in the end, but I the system resets itself once voltage levels are restored (this is my understanding).

Steve
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Old Oct 9, 2009 | 02:47 PM
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I checked with engine off that's perhaps why the reading was 12.3V not higher. I'm sure the battery is just still to low and not the alternator or some other circuits. I was just wondering if I could reset it but if it is suppose to go away by itself then I just do some stuff in the afternoon and drive there and charge the battery more!

Edit: Yes I will let you know if it went away!
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Old Oct 9, 2009 | 03:11 PM
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04 E320 4 Matic, 95 Audi S6, 99 Carrera 4 Cabrio, 12 Fiat 500 Sport, 00 BMW R1200C 10, BMW R1200R
It might be that one or both of your batteries are at the end of their lifespan. The dealer should diagnose this free of charge if you get a battery from them.

On a side note. .. I’m an alumnus of RWTH Aachen. . . I have spent some great years of my life in Germany!

Steve
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Old Oct 9, 2009 | 10:35 PM
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Good news... I got into the car and after turning the ignition ON immediately I got the message that all comfort systems are restored and fully functioning.
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