That won't rattle, it will just squeek when you hit a bump. It will also sound like it is comming from the windshield. Do it anyways though, that squeek gets anoying. Sometimes it is difficult to find where those rattles are comming from. It my sound like it is only driverside, but it could be the console. Put your hand on different parts of the car while you drive, keeping your eyes on the road, to find the rattle.
this is caused by the round rubber bumper located in the center by the windshield. I have fixed this on mine and numerous other regals, not just turbos. it is annoying and sounds like something is in the dash like heater ducting rubbing against something. the dab of grease will remedy it in a hurry.
Mustang, it's what's for dinner.