Citreon C4 Grand Picasso 1.6 HDI VTR+ HELP

I have to replace the Gearbox Actuator Hose (green) which runs behind the ECU (blue)
the ECU is connected to a black box (red), need to know what it is as I have to remove it
(see photo)

Answer #1
No idea about cars but it may be described in the service manual?
http://ebookbrowse.com/citroen-c4-picasso-grand-c4-picasso-owners-handbook-pdf-d94623133
Don’t download it as it’s trying to get you to install some exe, it will display in the PDF reader eventually though
Answer #2
Thanks, I already have that manual and it doesnt say anything in there.
Answer #3
You could try d/loading autodata all the garages use at a cost of �800 a year there is a cracked version here on wbb,if you torrent you can find newer editions.http://www.google.com?t=18135970&highlight=
Answer #4
I have a Mac so wont be able to run that Auto Data, thanks anyway.
Answer #5
I got told its a Hydraulic Block but cant find anything on Google about it :-/
basically just need to know how and what its connected to and whether its easy to take off,
I dont want to remove it and have anything ‘behind it’ pop out as I wont know where to put it back to.