Possible reasons for changes in the way the rain sensor works
The rain sensor may misread what is happening in the detection zone of its sensitive rain-sensor
surface ⇒ fig. 83 (arrow) and not work for a number of reasons, which may include:
x Worn out wiper blades: Worn out wiper blades may leave a film of water or wiping streaks; this can cause the wipers to run longer, to wipe more often, or to wipe continuously at high speed.
x Insects: Insects hitting the windshield may trigger the wipers.
x Salt streaks: Salt streaks on the windshield from winter driving can cause wiping more often or continuously on glass that is almost dry.
x Dirt: Caked-on dust, wax, any other buildup on the windshield (lotus effect), or car-wash detergent residue can lower the rain sensor's sensitivity and cause it to react too slowly or not at all.
x Crack or chip in the windshield: If a stone hits and chips the windshield while the rain sensor is on, this will trigger a wiper cycle. After that, the rain sensor will recognize the change and recalibrate itself to respond to the sensitive surface's reduced detection zone. Depending on the size of the chip, the sensor's reaction pattern may or may not change.
WARNING
The rain sensor cannot always recognize rain and activate the wipers.
x Switch the wipers on manually when water on the windshield reduces visibility.
Clean the rain sensor's sensitive surface ⇒ fig. 83 (arrows) regularly and check the wiper blades for wear or damage.
To remove wax and coats of polish safely, we recommend using an alcohol-based windshield cleaner.
Checking and refilling windshield washer fluid
Fig. 84 In the electric motor compartment: Cap of the windshield washer fluid reservoir.
WARNING
Unsecured or incorrectly stowed items can fly through the vehicle, causing serious personal injury during hard braking or sharp steering or in an accident. Loose items can also be struck and thrown through the passenger compartment by the front airbags if they inflate. To help reduce the risk of serious personal injury:
x Always stow all objects securely in the vehicle. Always put luggage and heavy items in the luggage compartment.
x Always secure objects in the passenger compartment properly with suitable straps so that they cannot move into the deployment zone of a side or front airbag during sudden braking, in a sudden maneuver, or in a collision.
x Always keep storage compartments closed while driving.
x Never stow hard, heavy, or sharp objects in the vehicle's open storage compartments, on the luggage compartment cover, or on the top of the instrument panel.
x Always remove hard, heavy, or sharp objects from clothing and bags in the vehicle interi-or and stow them securely in the luggage compartment.
WARNING
Transporting heavy objects causes the handling characteristics of the vehicle to change and increases braking distances. Heavy loads which are not properly stowed or secured in the vehicle can lead to a loss of vehicle control and cause serious personal injury.
x Transporting heavy items causes the handling characteristics of the vehicle to change by shifting the vehicle's center of gravity.
x Always distribute luggage evenly and as low as possible within the vehicle. The vehicle capacity weight figures apply when the load is distributed evenly in the vehicle (passengers and luggage).
x Always stow luggage and heavy items in the luggage compartment as far forward of the rear axle as possible and secure them with appropriate straps to the tie-downs provided.
x Never exceed the vehicle's Gross Vehicle Weight Rating or Gross Axle Weight Ratings, which are printed on the Safety Compliance Certification Label located on the door jamb of the driver door. Exceeding the permissible weight can cause the vehicle to skid and behave differently.
x Always adapt your speed and driving style to accommodate your payload and its weight distribution within your vehicle.
x Be especially cautious and gentle when stepping on the accelerator pedal and avoid sud-den braking and other maneuvers.
x Brake earlier than you would if you were not driving a loaded vehicle.
NOTICE
The defroster heating wires or antenna in the rear window can be damaged by objects that rub against them.