I recently purchased second hand car and the car dealer asked if I wanted to buy a warranty. I said 'no', since in the past they have rarely paid out for faults.

He replied 'well we have to ask, and because you've said "no", you don't want to buy an extended warranty, this means that you are accepting that the car is fully working and in good order and this affects your consumer rights should it develop a fault.'

I do not believe this affects my consumer rights one little bit; the car should still be fit for purpose as an (expensive, £20,000) car and if it develops a fault in the next six months it will be returned to be fixed.

Am I right, or is he?