Over the past few weeks I have noticed a strong smell of diesel (not exhaust fumes) from the front of the car. Mine is a 1.9 cdti 150. It is noticeable outside the car after it has been running for a while. My wife says that it stinks in the morning and it seems to be coming through the air vents when the heater is on. I have read a few similar posts and it may be the flexi pipe (whatever that is!). Any thoughts? Especially on price?