Assuming like me, your glovebox is full of cosmetics, have you tried reaching over and popping it open?It's getting in and out on the nearside in light trousers that causes the passenger side whine rather than the length of the journey. The inside of the Grenadier is quite clean and doesn't cause marking on the back of the leg. Another nearside whine can be caused by the design of the Buzz Overland side steps. They have nice little round holes on them to let the water out. Perfect diameter to get a high heel stuck in and snap off on exiting the vehicle. That causes a very loud loud noise that is distinctly audible from the drivers seat.
That reduces noise levels for a good 10 minutes.