Question about Mercedes-Benz C230

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My mercedes sat for 10 months while I recuperated from injuries. The battery was completely dead. Remote didn't even work. We were able to jumpstart it with battery cables but it won't keep running. Dead as soon as you stop. I put a battery charger on it overnight and drove it off and on for a couple of weeks. Then it sat another 3 months. Same again- dead. Do you think jumpstarting it is not enough and I need to let it charge all night again? Is this normal?

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You will burn out your alternator if you keep on doing this.The alternator is not a charger. If you have a dead battery you should always charge it overnight on a charger.To keep the battery fresh all that you have to do is disconnect the terminals.Yes this is normal because the car has clocks and alarms that drain power even when the key is off. If you let the battery set to long while it is drained it will not take a charge.

Posted on Jul 06, 2010

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