I'm unfortunately in a really sticky situation with a 2010 SEAT Leon 2.0 TDI CR FR. I bought the car new in 2010 from a main SEAT dealer, and the car has been serviced and maintained at the same main dealer all of its life, always serviced on time and all maintenance and replacement parts sourced and replaced by this dealer.

Unfortunately, five weeks ago, at 83,000 miles, the car just cut out at low speed and wouldn't restart. I had the car recovered to my trusted main dealer and left them to work on the car. After some hours they had stripped the engine down and found that cylinder four had literally zero compression.

At first they thought it was an issue with the injectors over fuelling, so had all the injectors sent away to be independently tested, but for all the tests to come back perfectly fine. Cutting a long story short, five weeks later my car is still in pieces and the dealer doesn't seem to know what the issue is.

Speaking with their service manager yesterday, he advised that the longer they spend trying to fix the car, the more in labour it will cost me and it may be cheaper to either sell or find a reconditioned engine. What should I do?