Ok so I'm in a position Where I changed out Rear Pads on my 2003 Passat,(wagon) B5, and now the brake pedal Drops straight to floor.. Won't tighten up at all. Do I try bleeding them? I went out and bout the Rear piston decompression tool, and I can't get Pistons to press back out. I have no breaks at this moment and I'm. Family of 5 . Really need so.e advice to get my VW back rolling. Can someone tell me how to get rear Pistons to press back out?