22-06-2015, 06:59 PM
I've never had a HDI bottom hose off, but as far as I can tell on SB they use a normal push on hose, where the XUD can use either of the push IN and o-ring hoses, earlier ones used the black plastic bti later ones the metal with the wire clip.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.