Hey, you would be looking into the measuring blocks:
For the 1.8T; one would need to see, which ones show the right info:
Looking online; one website, discusses the readings and what you would typically see, depending on the milage and problems, you might be having.
Following info found somewhere on the russian net as official manuals say nothing for first and second stage of EA888 ...
How to diagnose a chain stretching?
Connect VCDS --->
go to Block - 1 (engine)
---> measured group
---> 93 group
---> Phase Position.
What is the angle of misalignment of shafts critical for us? 0 - 2 degrees - a value characteristic of the new machines, or machines with the new circuit; 2 - 4 degrees - the recommended chain replacement value at which you can hear a clear metallic ringing of the left side of the engine))) 4 - 6 degrees - Urgent replacement or dumb luck.
I haven't done this yet with VCDS on my 1.8T; check out the measuring blocks and any values, you see and hopefully, you can see if you need to replace the chain/tensioner. Let us know, what you find out and we can go from there. Thanks.