Hello. Just got this thing last week. About 150 miles on it. This has happened twice: when I turn the wheels to go up a semi steep incline (garage or gas station entrance) I hear/feel a grinding sound coming from under the car. It happened at the dealer the first time pulling in but I thought it was just the ABS kicking in from pebbles on the road. I did a google search and found others with the same concern but no real info. Has anyone heard of this? Is it the AWD system or something? It sounds horrible