Just 30 minutes ago I had just made a quick stop by the post office and was on my way back to my office while on the phone with a friend. I had stopped at the post office with no problem, got back in and drove about 2 blocks to the red light when slowing to the stop I heard a LOUD awful metallic screeching sound. I thought I had picked up something on the road and was dragging it (and just hoping the sound was amplified by the buildings surrounding me). I looked under the car and nothing was there. The sound is not present when in reverse, but moving forward at any speed it varies from a slight scratching sound at slower speeds (with a metallic sound that you can even feel) to a attention grabbing loud squeal at 5mph or higher. I called Tesla roadside and he had me put it in reverse and aggressively hit the brake to try to dislodge a rock or some type of foreign object that might be in the brake pad but it didn't make any difference. I cannot specifically tell if it is one specific wheel or both, or neither. *Roadside just called me back and after talking with his supervisor he suggested trying the method of going forward and hitting the brake aggressively and then backwards again a few times to see if that would dislodge it. I hope this works because I'm about 120 miles from the nearest service center.