the xantia doesn't have a seperate power steering circuit it has one main hydraulic circuit with one pump which supplies the suspension brakes and steering, the reservoir is the container on the right hand side it has a lot of rubber pipes going to it , the level can only be checked with the suspension set to maximum height ,then the orange ring on the float should be between the two rings on the clear plastic dome ,L H M fluid ONLY must be used to top up the system any other fluid WILL damage the rubber seals resulting in complete hydraulic failure, if servicing has been neglected the system will require draining, filters cleaning, and fresh L H M fluid putting in the fluid should be changed every 2 years, invest in a haynes manual has the full procedure in that
bob k, January 2010