I am posting this information to help everyone who has a Mark2 C5. The hydraulic pipe which runs along underneath the car on the drivers side on right hand drive cars has what i would describe as a design flaw from the factory- if you have a look underneath any C5 at the rear where the pipe exits from underneath the cowling you will find that the cowling is actually touching the pipe or if not it is very close to touching it. To rectify this please cut away a piece of the cowling very easily using a stanley knife so that the pipe will be clear from any chaffing. I know this as i have just had to have my pipe repaired - it could have cost me £800 at Citroen or also same at independent repairers but i found a solution which is a great repair. Check your pipework now before its too late as this can lead to catastrophic suspension failure - oh yes i lost all 5.5 litres of fluid due to this!!!
If anyone wants to know the easiest and cheapest solution to repairing the pipework at the rear of hydraulics if yours has already started leaking then i can tell you how to make a successful repair for the least cost which is safe and will pass mot inspection.
Thank you for your attention