With the dedicated switch harness included, there is no need to check the corresponding grade. All grades are OK. E-MARK (European standard) SAE & DOT (American standard) Double standard, there is no problem with vehicle inspection. You can add the function of back fog to the vehicle. With a dedicated switch, you can select from three modes:back fog mode, normal mode (center LED not lit), and brake interlocking mode (center LED works in conjunction with the brake).