Originally Posted by E92Vancouver
Having the radar detector too high reduces its effectiveness and range because of the dark window tinting at that level.
For maximum range, the radar detector must be below the window tint.
Yes, you want it as high as possible, but still below the tint bar at the top of the windshield.
Valentine 1 recommendation: Detector performance is enhanced by a high mounting position. Two reasons. For radar, a longer sight line to the horizon always helps. For laser, moving away from the hood and its sun reflections helps a lot.
Link to page in V1 manual
And Laser detector mounting