In answer to some questions above - from my experience on the subject with Renault:
Clutch Approx £ 480 inc fitted
!!!!!
I did manage to get mine under warranty after a lot of moaning that it wasnt up to the job....blah....blah
Renault will basically say that it will be replaced under warranty if its failed prematurely due to a fault, (Oil leaking on to it or something) but the driver is liable if its abuse. They will be able to tell if its been abused by looking at it (mine was blue in places - denoting lots of heat, and the clutch plate distorted - (denoting I was racing someone and just had to get ahead at all costs.....even if it meant ramming the gears in as fast as poss)
As regards a contribution from them as a compromise in certain circumstances - that will depend on the mood of the manager on that particular day....... probably