Well, after the VW Dealers diagnosis, it appears that my steering clonk is not the steering column after all since the Pedal Box replacement.
They did extensive testing of all the steering, axle, wheels etc. They think the clonk is from wear in the Trackrod arms. They are ordering 2 Trackrod arms for me to fit in a few weeks to see if it cures the problem.
I'm not convinced, though I notice that each time I get the car back, since they've jacked it up etc this must re-settle the bushes in said Trackrod arms as the clonk disappears for about 30 miles, and then returns later.
But hey if it's done under warranty I ain't complaining.
