For a Fiesta 1.6 TDCI 2005-2008 DuraTorq-TDCI engine the capacity is 3.8L with filter 0.4L. 5L will actually be too much. I'd fill the filter before putting on, fill up to 4L and then slowly apply the 0.2 leaving to rest and check.
Filter? I assume you mean oil?
I use Miller's oils site to get fluid capacities (just bear in mind it uses a comma for a decimal points) which comes up as 6 litres of coolant.
As above for oil capacity. I've started pre-filling the filter as well.
_________________________
2005 Fiesta ST - wrote off
Newman fast road cams, Fusion Fabrications custom inlet manifold, custom exhaust