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

Uneven accleration

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Old Feb 10, 2013 | 06:27 PM
  #1  
Lgraz5's Avatar
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2003 C230K & 2007 C230
Uneven accleration

2003 C230K, 230K miles, original battery. Lately, when accelerating onto highway or going up hill at speed the car seems to run unevenly almost feels like an intermittent hesitation or "stutter". Problem seems to go away after 40 - 50 miles of high speed driving. No CEL, warning lights, mileage unaffected, loss of power or speed. No obvious issues except for 2 battery/alternator warnings in the last 6 months that cleared as soon as I restarted. Thoughts?
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Old Feb 10, 2013 | 07:37 PM
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JDM_love's Avatar
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From: Miami, FL
2002 Miata
Sounds like it has something to do with the accelerator sensor.
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Old Feb 10, 2013 | 10:55 PM
  #3  
SunnyRayToronto's Avatar
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From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
Sounds more like it has something to do with the transmission or carbon buildup,...
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Old Feb 10, 2013 | 11:18 PM
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02C240's Avatar
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c240
sounds more like you need a new battery sooner than later..
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Old Feb 11, 2013 | 12:12 AM
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Originally Posted by 02C240
sounds more like you need a new battery sooner than later..
+1

Ten years on the same battery, Wow !. It certainly does not owe you anything.

I often read on this site of unusual electrical happenings to 203's when the battery is old & weak.

May be the first thing to try is a new one as you have had two warnings . After your 40 -50 miles drive the alternator may have charged it up sufficiently.

Keep us informed.

Last edited by Carsy; Feb 11, 2013 at 12:14 AM.
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