Hi there, I have a 2008 C30 2.4i and the buttons on both of my keys dont work. I replaced the batteries. The other thing I noticed is the driver side door lock/unlock button does not work as well. It is not even lit up but the passenger side door unlock/lock button does work.
I have hear many different responses that it could be a broken wire in the door or the key needs to be reprogrammed but I am really unsure at this point.
Thanks, Matteo

 

. Had problem with my 09, turned out that I couldn't have both keys in the next car at the same time. Reprogramming and stashing one key fixed the problem.....funny Volvo....