[Tannaton]

A few points...

- I think what you really need is a decent honest garage - maybe one injector seal needed doing but this shouldn't cost £250 and how they discovered that when removing a stone from the brake caliper?

- Too much of a coincidence for me that you have a DPF issue a few days after someone has worked on the injectors...

- Pattern DPF's are available quite cheaply, circa £200.

- Any "in-tank" cleaning additive is not going to help you...