In Mercedes E300 model 2010. What is the function of Auxiliary battery?What is the difference between aux battery and main batter on my car??
Asked by Sharif_alameer Jul 20, 2013 at 12:21 PM about the 2010 Mercedes-Benz E-Class
Question type: Maintenance & Repair
In Mercedes Benz E300 want is the function of auxiliary battery?.
What is the difference between main battery and auxiliary battery?.
Where is the location of auxiliary battery and main battery on the car?.
14 Answers
www.youtube.com/watch?v=lTH1Lve9lqE
Again James not helpful!
www.youtube.com/watch?v=Jak7xKCYOq0
http://m.youtube.com/watch?v=neVPZnHAF_w&feature=relmfu
The last two posts is the best videos I could find. The first one is for your large battery in the trunk spare tire area. (www.youtube.com/watch?v=Jak7xKCYOq0). The second one is for you smaller one for the SBC. I believe this is the one giving you the issues. (http://m.youtube.com/watch?v=neVPZnHAF_w&feature=relmfu ). Hope this helps
Battery in engine bay is only for starting. All other electrical functions of the car are handled by the auxiliary battery in the trunk.
How to change the auxiliary battery malfunction Mercedes e300
E250. How to change battery malfuntion
Thought this was a big deal. Got "Auxiliary Battery Malfunction" on my dash yesterday. Today, in addition, there was a message that read "Change Key Battery." Brought the car into dealer & service advisor said bring the key to the cashier. In less than one minute, the cashier changed the battery at no charge & gave me back the key. When I started the car both messages disappeared & I was on my way. Very simple solution.
joshiauto1111 answered 8 years ago
does E280 cdi 2008 have auxillary battery
The same thing happen to me, with my GLK, I when and got my battery change then complain about the message that show up so they told me 210$ to change the the battery which they could not explain what is the function of the auxiliary battery , but as soon as I return to car all notice disappeared. So I can cancel my 210$ appointment. All I need to do was change the battery in the remote.
mercedes dealers are con men ,,,great car fucked up service!!
bobkat's answer is off. The main battery in both videos are in the truck. And the aux battery is in the engine bay, under cover. So what is the function of the aux battery and why is it necessary? The auxiliary battery exists for safety concern. Say there is a faulty alternator that won't charge. Eventually, the main battery drains and quit. In older cars this is not a problem and most likely, you can still brake to a stop. In newer ones with ABS, ALS, EBRAKE, etc. The brakes are electronically controlled. Therefore, if there is no electricity, there is no braking. The aux battery takes over when the main battery fails. Most newer german cars have this feature. Hope this answer helps.
