I have a virtually standard 2019 GTi, but when I'm using the ACC and have the picture of the car on the road in the AID occasionally I also see a picture of a second car slightly in front of mine on the right-hand side likes it's overtaking.
To me it's something I would expect if I had a 'blind-spot' monitor warning me that a car was next to me.
I only see it for a second and then it's gone.
What is it? and is it telling me something?