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I did a search but didn't come up with anything. I keep my car on a Optimate 6 battery tender and so it has never had a dead battery, but if it isn't on the tender, the battery drops fairly quickly. A few weeks ago I checked the output from the alternator and it was fine at 14v so that seems OK. I figured I would freshen up the original battery and bought a Mercedes factory correct battery and put it in. My tender is hard wired and so I plugged it in. As expected it was in float mode very quickly. I drove the car on Monday and didn't drive it since or plug it in either. This morning I went down and with my hand held battery tester it only showed 75%. It's back on the tender now and it's showing some amperage going to it, so the tester wasn't wrong. I know C32s had drain issues, but I haven't seen anything about C55. Thoughts on what to check???
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06-03-2011, 08:02 AM
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