Interested in what you may have to share or sellGday from Australia. I have just found this thread as I am looking for a solution on the instrument cluster. The power steering on mine works perfect. I used a Holden commodore 6.0 litre L98 (and it has a rack and pinion in it) and put it in a Vito. So I just cut the lines and tigged them together and the merc rack works fine off the Holden pump.
I did some cool stuff like 3D printed the mount for the Holden DBW accelerator pedal to bolt onto the Merc firewall etc. and I have done 20,000 Klms in it without any issues.
I am really interested in buying an electronic unit to adapt my instrument cluster and would like to hear your thoughts on it. My van is an 07 as well.
Oh the vito doesnt have duallies but she does spin the wheels! More than a little bit....
Look forward to your thoughts.
Working on an L98 into 906 sprinter
I am also working on CAN interface, although in very early days