I have a 2016 Etron Prestige with adaptive cruise, there is a system setting for lane assist vibrate which I have turned on. My understanding is the car should just automatically keep itself in the lane if I'm going over 38mph, but I don't think that's happening, is there something else I have to do? I'm not too keen to swerve into another's lane to test it out, but I did try slightly drifting and nothing happened. I got the car fully loaded, and I see on the 2016 highlights for the US version on Audi's website that it does include lane assist so not sure where to go from here.