sinking brake pedal

[dave_Sw1]

Hi, I have a gs4 Lancer diesel sporthatch on a 58 plate, when you press the brake pedal the first 30-40% of the total pedal travel can on some occasions happen with basically no resistance under foot, meaning the pedal only comes in after that point, then if you are stationary, and apply a reasonable amount of pressure, you can push the pedal till it goes to the floor. I've driven this car for 15000 miles and it never did this until one day when it started doing it, I took it to mitsubishi and under warranty they have changed the servo, the master cylinder and the abs pump, and now say they have fixed it, but its exactly the same, They have sent the car to the uk head office technical department and they say its fine- I sat in a 4 door lancer diesel in the show room, and it had a normal hard brake pedal that would not sink to the floor, but mine does, and yet they are telling me its fine! could anyone please tell me if under any circumstances it should possible to press a brake pedal to the floor when stationary, I don't think its right or safe but am being told otherwise!

also anyone know what my options are as they now claim its fine and want to return the vehicle?

Cheers

David

[dave_Sw1]

it never used to do it though, and letting it sink till you feel it hit the hard stop, really doesn't inspire me that its safe

[dave_Sw1]

also the fact that they had another one in the showroom that didn't do it, suggest there is something not right about it