Im asking this question for my dad, he has had the car for a few years now, and since brought it has been broken, the seat height adjuster wont pump up, we had a look and you can see the actauator canister thing, every so often it will pump up a bit but just fall again, is it possible to replace the actuator or is it a case of having to take the seat out completely?

And also he is quite keen for a focus ST 08+ and thinks it is very expensive to run the car, is this true or is it not too bad.