I am unsure if this is the battery as the central locking still works and I appear to have not left anything on in the car, ie lights etc? Its an audi a3 1.8 petrol
Thanks, Alex

alex, January 2010

Sounds like a flat battery.The doors etc. dont need a lot of power, but turning the engine does. You can buy a simple multimeter or clip-on tester from Halfords etc, or even easier, one like this (copy and paste url)

http://uk.ebid.net/perl/auction.cgi?mo=auction&auction=23532752&from=googlebase

which just plugs in to the lighter socket.
Local suppliers, tool shops, motor factors etc should stock something similar.

calum, January 2010