So I am now a week into driving my new Model X and hoping other owners can help their experience. I noticed today (and a few days ago) I will be driving along locally at 45 mph and suddenly I hear a grinding type noise under the vehicle. It only lasts a moment and then gone. Sounds like some sort of binding in the electric motor? But no loss of speed or power, just the noise. Lasts maybe 3 or 4 seconds. Other question is I put my suspension at the standard setting but when I get home after running errands it always has set itself to "low". How can I force it to stay in standard unless I change it myself?