Hi I also had the stearing rack leak, citroen Carcasonne gave me 2 o rings of 2 differant colours and size but in the end i had a replacement rack fitted by a freind, bought from Euro parts, another freind had the same trouble,with a 2009 modle, but had to go to citroen as the newer modle is fixed on differantly, mine is a 2007,10000mls non Citroen garages would not touch the new modle as this replacement could need cutting off due to corrosion apart from the sub frame having to be removed, This is only what i have been told so dont take this as gosple :)