Hi Adrian, Funny you should say, mine packed in two weeks ago, stuck straight up the windscreen much to the amusement of the local Audi and BMW brigade. I took it down to AWJ on Sutherland Road in Longton, SOT and one of the mechanics took a look at it and after checking everything that you have Adrian, deduced it was either the motor or the actuator. Also rather than mucking about stripping the assembly down they replaced the whole thing with one off a bi turbo diesel, so I'm assuming there is a fair amount of standardisation with the assembly. And they sorted it within a day. £126