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Battery disconnect switch considerations

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Battery disconnect switch considerations

 
Old 12-13-2013, 06:36 PM
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2003 E 320, 2005 ML 350, 2009 ML 320 bluetec 2008 E350 Wagon
Battery disconnect switch considerations

Hello all, I have a 2005 ML350 that I have owned since new. Its now on its third battery, the most recent was installed in October after sitting for 5 months. This vehicle was my every day driver, but now resides full time at a vacation home. Many months can go by with this vehicle not driven. I have been warned against a solar charger. The suggestion from MB Roadside was to disconnect the battery when the car was not being driven. My preference would be a battery switch. I'm wondering what the best way to do this is. I'm also concerned about the ramifications of no power to the memory components.

If anyone has experience with this, please advise. Thanks in advance.
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Old 12-14-2013, 07:31 AM
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2002 ML 320 & 2006 ML500
Read this. What it says is you will have to take the battery with you and slow charge it every month.
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Old 12-14-2013, 10:21 AM
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1990 190E 2.6, ... 1998 ML320, 2005 ML500SE
Jim,
I have 2 CTEK US800 maintenance chargers, supposedly the same charger that is sold by Mercedes and Porche. I currently have an AGM battery in my ML500. The battery hold down bracket has a warning to disconnect the negative battery terminal while charging which is a pita. I currently leave the maintenance charger on my 190E for months at a time, without disconnecting the battery, with no problems so far but these are very different vehicles.

What is your viewpoint on leaving the battery connected while using a maintenance charger.

Mike

[EDIT] My thinking is that removing and/or reapplying the battery terminal could cause a surge or arc that could be more damaging to the electronics in the ML than properly connecting a maintenance charger.
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Last edited by Mike's ML; 12-14-2013 at 03:19 PM.
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Old 12-14-2013, 03:14 PM
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Hi Mike, Unfortunately the car resides in a parking lot where I have no access to AC power.
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Old 12-14-2013, 03:43 PM
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Originally Posted by Mike's ML View Post
Jim,
I have 2 CTEK US800 maintenance chargers, supposedly the same charger that is sold by Mercedes and Porche. I currently have an AGM battery in my ML500. The battery hold down bracket has a warning to disconnect the negative battery terminal while charging which is a pita. I currently leave the maintenance charger on my 190E for months at a time, without disconnecting the battery, with no problems so far but these are very different vehicles.

What is your viewpoint on leaving the battery connected while using a maintenance charger.

Mike

[EDIT] My thinking is that removing and/or reapplying the battery terminal could cause a surge or arc that could be more damaging to the electronics in the ML than properly connecting a maintenance charger.
**
**
Mike, I am not familiar with this CTEK thing at all. Never laid up any vehicle.
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