The tach and speedometer fade during day sunlight to the extent the reading cannot be determined. when the sun reflects on the on those two items they fade and cannot be read, creating a safety hazard; the occurs when the vehicle is stationary and in motion and occurs on city streets and highway. it also occurs when turning and braking. the fading of the tach and speedometer display cannot be read under the above conditions when the sunlight enters the car. since you cannot read the speed markings when this happens it is creating a safety hazard and a legal liability for he driver.