My 2001 C320 keyfob won't unlock the doors. I just put in new batteries and the little red light flashes when I press the buttons, but the doors won't unlock. I used the valet key to get in, and when I put the key in the ignition, it would not turn...

Any idea what might be wrong?[&o]

 

I figured it out. We have a dead battery.[&:]

Here's a good link to a site that helps you understand your electrical system:

http://www.autohausaz.com/mercedes-a...l-systems.html