part 1: https://www.youtube.com/watch?v=EugoaULKg1Y
part 2: https://www.youtube.com/watch?v=um0g75J1aJY
I watched these over 2 nights. Very interesting one. And pretty bizarre. I wanted to blame VW for...well, everything. But the actual fault MAY have been related to lax oil changes. Or, perhaps more likely, unreasonably long factory intervals. Either way it was only a $50 part in the end. But the computer was of no help at all in figuring the problem out, in terms of its self-diagnostics.
I like to watch these and think...would I have found the problem with the tools and methods I have available? In many cases, the answer is yes. I think if I figured out it was related to the intake phaser I may have just pulled this actuator thing off and fooled around with it and maybe thrown one at the car if I didn't like how it felt.