Ford Focus III - Diesel Pariculate Filter Problems - Focus100

Dear all,

I've had a Ford Focus 1.6 tcdi 06 plate for just over a year. I bought the car from a well know national car supermarket. In January the engine management light came on and it turned out that the DPF needed repenishing. As this was not covered in the entended warrenty I paid for, I had to bring it down to Ford and paid £100 for it.

Now the light has come back on and having taken it back to Ford they have said the DPF needs relacing completely and have quoted £850!!!! They have advised me to take it back to where I bought it because they believe that X did not replenish the DPF at the 3 year service as recommended by Ford (the company did the 3 years service just before I bought it). I have taken it down to them and put it across as strongly as possible. I am just note sure what I stand legally, is this just a recommendation by Ford??

Any help / comments would be appreciated. cheers