I have a 1997 C230. The check engine light came on a while back, I reset the light by disconnecting the battery - it would come on again 1-2 days later. I also experienced a little hesitation when the car was warming up.

A couple of weeks ago, I changed the battery. Both of the above problems disappeared. There is no check engine light and the hesitation is gone.

What could have been the problem??

Thanks!

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dyazdani
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'97 C230
'03 Honda CBR600RR
'92 Ford Explorer