Hi there Loz,
My van is a 2014 SE 180 4 motion.
I classed it as a 5.1 as the only matching image of the Haldex unit I found was on a post for a Transporter.
While I was doing an oil and filter change it occurred to me that I did not know where the fuse was for the pump.
I can find the fuse for the control unit but would expect a seperate fuse for the pump.