I purchased new the 2013 Model S. From the very beginning, I felt the headlamps, particularly at low beam, were very poor. I would keep my high beam on and never did a car approaching from the opposite direction signal to lower my beams. Brought to service attention and I was told they cannot be adjusted. When taking a 90 degree right turn on a dark street, I cannot see if there is a car parked on the side of the street. I noticed on a 2015 loaner car the the headlamps were improved. I feel this is a safety issue. Low beam should illuminate 150-200 feet. My do not. I was told by an independent Tesla repair shop that they could change the headlights for $2600. They told me many people have expressed this problem. Any suggestions.