My battery died overnight when a light was left on in my 2004 C70. The stereo system has stoppped working - only the word 'code' comes up in the radio panel and none of the features work. The cruise control is also not working. There is predictably a 'service' light on. A trip to the dealer always costs at least $500. Any ideas to get around some of this without spending a fortune? The car has 57K miles and no warranty and I'm getting concerned it is reaching the point when things start falling apart. Any hints or suggestions would be GREATLY appreciated.
Thanks, Bill