The auto adjusters are anything but. You just need a long ish rod with pointy end .. jack the rear end up and remove one wheel bolt and use a torch to spot the bottom of the wedge then lever it down until the wheel spins and you can just hear the shoes scraping slightly on the drums. Once done adjust handbrake cables in the car to three clicks, if this doesn't sort it then buy the cables. Did mine recently for the mot and had to replace one cable as it had stretched.
