I take it the C230 is a W202? If so the W210 is by far a better car. I have both and driving the W202 is ok if you have to go run to the store for a moment. But if you drive a lot. Get the W210. Its much nicer, rides better, better MPG, Better performance and you wont have a back ake while driving.

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2015 ML350 4Matic. Wifes DD
2015 GLK350 4Matic. My winter DD
2012 E350 4Matic. Road Trip car
2009 CLK350 Coupe Designo.Kleemann Tune For nice days/DD
2006 CL600. V12.Eurocharged Tune. Enough said
2005 CLK55 AMG Coupe.Kleemann Tune. For the sound and style
2004 CLK320 Cabriolet. 2005+ Interior swap. For the sunny Florida days & beach days