My fob for the 2010 S80 works fine for opening the doors and trunk but has intermittent problems in staring the car. Sometimes when I insert the key and try to start nothing happens. I have to remove the fob, insert and try again. Sometimes 5-8 times before it will start. Other times it will start on the first try. Any suggestions? I have already replaced the battery in one of my two fobs. No difference.