2001 Mercedes-Benz S430 Q&A
2001 Mercedes-Benz S430 Question: Why will my key not work? I've changed the battery,but it wont open the doors.
TRY ANOTHER KEY IF AVAILIBLE TO START WITH.COULD BE IGNITION SWITCH ASSM HAS GONE BAD - globalhelper
You'll need to sync the key with your system. In short it needs programing. We can do that here with our Mercedes scan tool, same as the Mercedes dealer. - Prestige Auto Works