Thanks Paul for your help.
I can't find any evidence online to suggest that the power steering system is different. . Just browsing power steering pumps online for 2010+ A8s they all seem to look the same even up to 2015 units.. seems to be no pully on the unit rather a motor ...
I'm most certainly no expert mind so I could well be looking at the wrong thing!
If they all have electric hydraulic power steering is it possible the only difference is the address 44 unit? ... maybe some kind of motor that turns the wheel on the steering column?
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