Mercedes 2001 c320, changed batteries in both keys as they stopped working. One key lasted 4 weeks. The other is beginning to give trouble after 3 days. Other problem that has been occuring alongside this is that the battery drains off within one or two days of no use. Battery itself has clear window that indicates it is still good. When putting the negative lead back on after charging battery significant draw is evident. Don't know if this is related to the key problems.
Wednesday, October 12th, 2011 AT 4:32 AM