What does the Auxiliary battery control?

FamilyGuy4

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Your Mercedes
V-class 2018
Fault on the auxiliary battery in the v-class, but what does the auxiliary battery do?
 

00slk

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Your Mercedes
2002 SL55 AMG, 2005 E320 CDi, 2014 SLK250 CDi, 2003 SLK200
They all seem to have different references to these. Consumer battery, auxiliary battery, second battery, boot battery, starter battery, main battery, good battery, MB battery, or even flat battery, its no wonder I get confused.
If you are asking about the main battery it supplies the electrics to the internal switches and everything you need to play with electrical devices.
The starter battery is for cranking the engine over and is usually for Mercedes with 2 batteries.
Hope this helps, actually this is the limit of my electrical knowledge :)
 


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