See also:

Reporting safety defects in the U.S.
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTS ...

Vehicles equipped with Park Assist
Colored fields (4-one per sensor) indicate distance If the vehicle is equipped with the optional Park Assist system, the distance to an object will be indicated more exactly and colored markers i ...

Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see. ...