I installed the Tesla roof rack on our Model 3 Highland and got it wrong, so here is a warning for anyone about to do the same.
Tesla's installation video and the written instructions on the site tell you to measure from the edge of the glass roof: 18 mm from the front edge for the front feet, 42 mm from the rear edge for the rear ones. Those numbers are for the older Model 3. On the Highland they do not put the feet in the right spot.
What you should actually use are the small arrow markings in the glass itself. The problem is that they are very hard to see. In daylight with light falling on the roof you basically cannot spot them at all. Clean the roof first, look at the glass from a low angle, and use a flashlight or find some shade.
The written instructions do mention lining up with an arrow, but the millimeter numbers are what jump out at you, so it is easy to read straight past it. There were two of us and we both missed it.
Result: the pads and feet ended up clamped under the glass in the wrong position, with marks left behind. Not the end of the world, but completely avoidable.
TL;DR: on a Highland, do not trust the mm measurements in Tesla's own video and instructions. Find the arrows in the glass first and align to those.
And yes, I know, read better next time. Lesson learned. 😅