C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Battery/Alternator warning

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Old 01-22-2013, 10:37 AM
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2003 C230K & 2007 C230
Battery/Alternator warning

I've had the same warning Battery/Alternator message twice now, 5 months apart, totally different circumstances.

First time was in August, warm day, no headlights on.

Second time was 2 days ago, cold, night time, headlights on.

In both cases there was no change in performance, no additional warnings, no trouble starting, warning goes away after re-start. Battery is original (2003).

The only commonalities: I was using cell phone with charger plugged into lighter both times and warning came on after about 2 hours highway driving. Have duplicated those circumstances at least 10 - 15 times with no problems. Comments?
Old 01-22-2013, 02:22 PM
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2007 W204 220CDI Classic Sedan
Wow , what a battery life . Ten years is phenominal .

From posting on this site ,these cars seem very sensitive to a failing battery .

I would invest in a new battery with the same amp/hours capacity.Your local battery shop or auto electrician should be able to do battery load & a alternator output tests. AGM ...Absorbed Glass Mat batteries are recommended for these cars.

Keep us posted.

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