See also:

Cleaning the sensors
Location of the front sensors Location of the rear sensors The sensors must be cleaned regularly to ensure that they work properly. Clean them with water and a suitable car washing detergent ...

Windshield wiper service position
The windshield wipers must be in the service position before the wiper blades can be cleaned or replaced. See page 329 for additional information. ...

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 ...