I locked my mates smart car over the weekend and the lights flashed about 9 times, thought this was odd. checked every thing was shut, switched off and windows up. Locked it again, same thing. Told my mate and she said its been doing it for about week. Quick google search and found its telling you that the battery in the keyfob is going flat. Does are A4s doing any thing to inform us that the battery is going flat? I would not expect them to cause of their age.