@@Sentech There are actually two locations for the 2.8CRD (and 2.5CRD) fuel filter on 4th gen. On every 2004/2005 model I've owned they are underneath to the rear by the fuel tank. None in the engine bay, but I've worked on ones with the filter (with the small rubber manual primer on the top) in the engine bay as you describe also. There seemed to be several variations on the design and so you need to physically check as I've yet to find a way of finding which edition matches which location for fuel filter and lift pump!