I've posted on several other forums but no fix yet, perhaps one of you guys can help? A4 B6 2002 - I changed my battery in my remote but now it won't operate the central locking. I've tried the method in the manual which is press any button once and then unlock or lock the car but this hasn't worked. I've been onto Audi and they suggested a number of ways and basically said try them and see as if there's no one correct method of re-synchronising. Anyone out there got any ideas?