Take it to a main dealer. You need a spring compressor tool if you have one then. Wheels off remove track rod end and ball joint. push hub out the way. Remove the (2) bolts i think holding the Shocky to the hub. then open the bonnet and remove the top nut then it will pull out. COMPRESS THE SPRING before removing cap securing it to shocky or you will kill yourself.
Ex Citroen Tech
February 2009