Hi folks I have a 2006 VW Caddy Tdi every since i got it when i'm on a hill and have the handbrake or the footbrake on the handbrake light starts to flash and I get 3 loud beeps they light keeps flashing until i pull off does anyone know what this is??? By the way I'm just after putting a cuple of caps of dot 4 brake fluid into the res to see if that fixes it. At this point i can see the fluid in the res so fingers crossed.