I'm a member of this club too at 120,000 miles. First thing I did was change the MAF sensor. Still the same.
All my local garages said I should take it to the Audi dealer. I did this and they hooked it up to the computer. Apparently a faulty fuel cut-off solenoid was the diagnosis. Paid £142 to get that changed. Didn't make a bit of difference.
They also suggested the intake manifold was showing an intermittant fault. I know cleaning it out is a reasonably involved job so I might go to a local mechanic to do it rather than paying dealer prices.
I've just ordered an interface cable and downloaded vag-com so that I can check for faults showing after each thing that I do. Hoping it will give me a clearer picture of what's going on.
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