Cigarette Lighter charger - SL65 - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 09-07-2009, 06:03 PM Thread Starter
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Question Cigarette Lighter charger - SL65

Anyone have experience with a charger that plugs into the cigarette lighter and goes to an electrical outlet for power ?

I have a Porsche cigarette lighter charger that indicates by a redlight on the charger that it is charging.

I connected it to the Mercedes SL65 for three weeks, but it did not seem to work. When I started the car the battery was almost dead......is this because of the two batteries?

When I use with Porsche (one battery) no issue as battery seems full of life......any insight would be appreciated......thanks....
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post #2 of 3 (permalink) Old 09-07-2009, 10:51 PM
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It is because your SL65 has switched power on the lighter, a charger connected to the plug would not charge the either of the batteries.

You can usually change the plug to constant power but you would not charge the starter battery that way. On the other hand, the starter battery has no additional consumption than internal leaks.

Sedan models usually have another plug for rear passengers, possibly one at the trunk. It would be better to keep the front plug at switched power but I'm not sure if the SL has other plugs.
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post #3 of 3 (permalink) Old 09-08-2009, 07:33 PM Thread Starter
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There is a plug in the trunk I will check out...thanks...
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