While you wait for answers, we may have found some information which could help you.
Click here for Brake Pads VanBattery drain (or alternator or electrics?) on Citroen Berlingo 2008?
citreon berlingo 2.0 hdi van?
Citroen dispatch rear door lock issue?
Wiring to relay between fuse and starter motor?
Braking fault?
does the berlingo bend valves when the timing belt snaps?