A system for adjusting a sensor of a vehicle comprises: a base unit; a support structure connected to the base unit; and a vehicle calibration assistance structure mounted on the support structure and including a target panel, which has a surface facing forward towards a service area. The surface of the target panel bears a combination of predetermined graphical features, and the vehicle is positioned in the service area. A processing system is operatively connected to the vehicle calibration assistance structure. A positioning device aids with the relative positioning between the vehicle and the vehicle calibration assistance structure.