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Use Porsche Battery Maintainer on Mercedes SL500?

John S
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John S Member

John S

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Does any one know if the Porsche battery maintainer can be safely used on a 2006 Mercedes SL500? If so, does the cigarette connection work or does it have to be connected via the alligator clips directly to the alligator clips in the Mercedes?

Thanks,

John

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Kim Member

Kim

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Does any one know if the Porsche battery maintainer can be safely used on a 2006 Mercedes SL500? If so, does the cigarette connection work or does it have to be connected via the alligator clips directly to the alligator clips in the Mercedes?

I can think of no reason why it would not work, other than a physical mismatch between the mantainer plug and the MB cigarette lighter. In that case, use the clips.

The maintainer is looking for a 12v battery in a negative ground system .... which applies to both cars. It does not know what brand battery might be there, whether its plugged into a Porsche or not.

Kim

2000 Cab

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Kim Member

Kim

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Umm... I think the lighter has to be on a unswitched +12 volts. That is, live even with the ignition off.

My bad, I thought they all were these days .... in this time of cell phone chargers, PDA chargers, laptop chargers, etc. At least .... its been a while since I 've had a car with a lighter that wasn't full time hot.

Kim

2000 Cab.

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John S Member

John S

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Kim,

I don't know - I just wanted to make sure he checked first because my 01 CLK55 AMG is not hot with the ignition off.

You're correct-the lighter is not hot with the ignition off on the SL500.

I have the battery alligator clip attachhment for the Porsche battery maitainer but I can't figure out how to attach the clips' connector to the cigarette lighter connection on the battery maintainer? Could you please help me on how to attach the alligator clip cable to the battery maintainer?

Thank you!

John :D

post-323-1139980458.gif

Edited by John S
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