Travelling...should I disconnect the battery?
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Super Member
Joined: Mar 2006
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From: Waikele, Oahu, Hawaii
2011 GLK350 P1, Multi-media & AMG Pkg; 2010 E350 w/ prem 2; 2018 4Runner SR5 Prem. 4x4
Travelling...should I disconnect the battery?
Hey gang...Im going on a biz trip for over a week. Should I disconnect the battery? I don't want to come home to find a dead battery. Any harm to the ECU or resetting issue is I do disconnect the battery?
Senior Member
Joined: May 2008
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From: Sarasota, Florida
2011 E350, 2004 911
MBWorld Fanatic!
Joined: Dec 2011
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From: Paradise
w212 E550
how about three weeks 
? i'm planning to go on a trip this summer for three weeks. i have never done it for all my cars before and didn't have any problem but wanted to know if disconnect is the way to go 
.
? i'm planning to go on a trip this summer for three weeks. i have never done it for all my cars before and didn't have any problem but wanted to know if disconnect is the way to go .
Out Of Control!!
Joined: Jun 2008
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From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Anything less than a couple of months at minimum and you shouldn't do anything but lock the doors and preferably leave a clean car (for piece of mind than nothing else).
Senior Member
Joined: Feb 2012
Posts: 295
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From: PNW
2010 E550 coupe
All modern cars discharge due to the various systems that are sitting there listening for things (e.g. remote sensors for the doors, alarm, etc.) Normally this rate of discharge shouldn't be enough to be a worry because once you drive the alternator will recharge the battery. However, if the car isn't being used for several months, the battery could be drained to such a level that it will not start the engine. This is why you often see trickle or solar charged used at dealers.
The amount of time for a battery to discharge will depend on many variables including the health of the battery.
The amount of time for a battery to discharge will depend on many variables including the health of the battery.
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Super Member
Joined: Sep 2006
Posts: 761
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From: Oklahoma
W211 E320 & W212 E550
One thing to not is our cars do noit use a small battery. These things are beasts and really should be good for months without a problem. I know my W211 has sit for over a month and never an issue.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
I would absolutely not disconnect the battery. That could result in problems.
