Using the rain sensor

The rain sensor monitors the amount of water on the windshield and automatically starts the windshield wipers. Rain sensor sensitivity can be adjusted using the thumb wheel on the right-hand steering wheel lever.
P5-1617 S90-Rain sensor
Right-hand steering wheel lever.
  1. P5-Icon red circle 1Rain sensor button
  2. P5-Icon red circle 2Thumb wheel, sensitivity/interval wiper speed

When the rain sensor is activated, the P5-1507-Rain sensor symbol rain sensor symbol will be displayed in the instrument panel.

Activating the rain sensor

When the rain sensor is activated, the engine must be running or the ignition in mode I or II while the windshield wiper lever is in position 0 or in the single sweep position.

Activate the rain sensor by pressing the rain sensor button P5-1507-Rain sensor symbol on the stalk switch.

Move the lever downward for an extra wiper sweep.

Turn the thumb wheel upward for increased sensitivity and downward for decreased sensitivity. The wipers will make one extra sweep when the thumb wheel is turned upward.

Deactivate the rain sensor

Deactivate the rain sensor by pressing the P5-1507-Rain sensor symbol on the stalk switch rain sensor button or moving the lever upward to another wiper mode.

The rain sensor is automatically deactivated in ignition mode 0 or when the engine is switched off.

The rain sensor is also automatically deactivated when the wiper blades are put in the service position. The rain sensor will reactivate when service mode is switched off.

 Important

The windshield wipers may start inadvertently and be damaged in automatic car washes. Deactivate the rain sensor when the engine is running or when the ignition is in mode I or II. The symbol in the instrument panel will go out.

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