I purchased a vw golf diesel 2 months ago, i discovered a warm start problem within 20 of picking the car up, I contacted the dealer immediately and ever since they have been fitting new parts to try and cure the problem, although through their own admissions are now at a loss. i am still not happy with the car, but the dealer is saying that it is fit for purpose although it might take a few more turns of the starter motor to get it started,. Do i have the right to return the car and ask for a refund?