Why is my Citroen C5's rear suspension losing height when parked?

I have a small (I hope) problem in that my Citroen C5 2.2hdi SX estate's (2003/52 plate) rear suspension loses height when left parked for a few hours. Once I activate the door unlock it quickly returns to normal and it drives normally too. No warnings have come up and I have had no previous suspension issues. It was serviced at my regular garage last February. Before I embark on the garage route, can anyone help?

Asked on 31 July 2010 by 5776evans

Answered by Honest John
Leaking rear spheres. They're actually no dearer to replace than dampers on a conventionally suspended car.
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