Standard complaint that we know all about. What happens is that the slave cylinder fails giving the same effect as the driver slipping the clutch. When they return the failed parts (if requested) they do not return the slave cylinders. Tell the dealer that sold you the car that this is a well known fault with the cars and is not your fault. It has been covered on BBCTV's 'Don't Get Done, Get Dom'. It is itemised repeatedly by Honest John in the Fiesta, Focus and C-MAX entries. And if the dealer does not replace the clutch, dual mass flywheel and slave cylinder entirely free of charge, you will use the small claims track of the county court to sue for the full amount. See: www.honestjohn.co.uk/faq/consumer-rights/