aux battery malfunction
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Joined: Dec 2016
Posts: 126
Likes: 13
2010 Mercedes E550 4matic Sport P2, Driver Assistant, Night Vision, Parktronic and Panorama Sunroof
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
W212 do have 2 aux battery systems and they do totally different things.
I prize MB for actually thinking for the owners and on lot of instances - protecting cars from owners stupidity.
So if the warning comes in yellow, that means you can continue to drive for now. Sometimes the message will tell you for how long.
But if the warning changes to red warning, be ready to immediately pull over and turn the engine off.
If you ignore that, the car can do it for you and that seldom is pleasant.
I prize MB for actually thinking for the owners and on lot of instances - protecting cars from owners stupidity.
So if the warning comes in yellow, that means you can continue to drive for now. Sometimes the message will tell you for how long.
But if the warning changes to red warning, be ready to immediately pull over and turn the engine off.
If you ignore that, the car can do it for you and that seldom is pleasant.
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,091
Likes: 4
From: Bandar Seri Begawan, Brunei
15 E200CGI SPORT
You can drive the car safely. The auxiliary battery is used for eco start stop function as well as the brake hold function. As far as I recall, the rest of the car will function just as fine.
MBWorld Fanatic!
Joined: Mar 2014
Posts: 3,107
Likes: 394
From: West Central Florida
2011 E550 P2 4M Sedan
OP, do you have a 2010? If so, the aux battery is for the electronic transmission shifter. https://mbworld.org/forums/e-class-w...placement.html
If you have a 2013 or later then it is for the eco start/stop feature. Different location and a much more expensive battery.
If you have a 2013 or later then it is for the eco start/stop feature. Different location and a much more expensive battery.
Super Member
Joined: Dec 2004
Posts: 921
Likes: 37
From: CA
MB
Save yourself some money
https://www.ebay.com/itm/Mercedes-Be...item1c8dd34a0f
change battery is very easily, dealer will charge you for diagnostic, remove panel B, remove panel C, unpack battery, disconnect battery, install battery, battery disposal, reset here and there, etc, etc, not to mention have the car for 4 hours !
https://www.ebay.com/itm/Mercedes-Be...item1c8dd34a0f
change battery is very easily, dealer will charge you for diagnostic, remove panel B, remove panel C, unpack battery, disconnect battery, install battery, battery disposal, reset here and there, etc, etc, not to mention have the car for 4 hours !
