I purchased a used Volkswagen Caravelle eight months ago for £23,000 from a large specialist dealer. The car has one previous owner and has covered 73,000 miles on the clock. The dealer included a 12 month warranty. Within two weeks of buying it, the DPF light came on. I returned it to the dealer who replaced the DPF and the turbos.

One month later the car started burning oil at a rate of six litres a week and it now transpires that the valves in the cylinder head are worn along with the piston rings. Also a valve in the oil filer housing is seized. I've been quoted a £5000 repair bill as the fault is not covered by the warranty. Is there anything I can do?