Hello! I just returned from Grease Monkey with my 2001 Cabrio. They said my battery is at 302 CCA, although it's supposed to be at 575 CCA. Also, my "check engine" light has recently come on. So ... this leads to a couple of questions: 1) does the 302 CCA really mean that my battery needs to be replaced? can it be recharged or ignored for awhile

? 2) could the battery issue be related to the "check engine" light?
Thanks for any help -- I've had my Cabrio for about a year and this is the first problem. I just love my little car!