After suspecting a bad master cylinder, I bit the bullet and got a new one and changed it over (hell of a job). Anyway new MC fitted filled up with brake fluid and proceeded to bleed the brakes etc ..furthest away and in proper sequence. I have used litres of fluid and getting a steady flow of fluid out of all the nipples with no air. I have also run VCDS to purge the ABS pump etc and yet cannot get a stiff pedal when engine running. Pedal goes nearly to the floor. Suspecting a dodgy new master cylinder I placed my old one back on as at least I had a pedal and yet exactly the same issue now with that one. I have spent a fortune now and used three complete days trying to sort this but with no luck. I have bled the two lines coming from the master cylinder also and still nothing...can anyone help please?? Before a hammer goes through the windscreen ... a4 b7 2.0 tdi 2005 sline ..thanks