Headlamp aim has been preset at the factory and should need no further adjustment.
However, if your vehicle is damaged in an accident, the headlamp aim may be affected. Aim adjustment to the low-beam headlamps may be necessary if it is difficult to see the lane markers (for horizontal aim), or if oncoming drivers flash their high-beam headlamps at you (for vertical aim).
If you believe your headlamps need to be re-aimed, it is recommend that you take the vehicle to your dealer for service.