Here you go!
Attachment 65785Attachment 65786
The first pic is what you see if looking down into the engine bay in the space behind the coolant expansion tanks. It gives you an idea of how tight it is for room. Mine is an earlier (04) di & may not be the same as your CRD though?
Second pic is the probe through the heat shield and into the mandrel bend. You can see why I decided to make the hole 40mm, this allows room for a socket to tighten everything in rather than a spanner, no room to swing a cat!
This pic is my digital gauge, very responsive and accurate. I used the space occupied by the old ciggy lighter. Hope this all helps!