Hello bal welcome to the forum some one will be along to help you shortly
There's another couple of options. One is to sign up for the free factory product information at "service.citroen.com" as an independent repairer; this will enable you to then make selective purchases of wiring diagrams and other repair information, charged by the hour at €5,20+VAT.
Your second option is to purchase black market DVDs with all of the chargeable information collated, and install these onto your computer. There are also torrent downloads but source and quality may vary greatly.