The rear window can be cleaned and wiped with the rear wiper/washer system. The system is controlled by a separate control unit that forms one module together with the wiper motor.
Terminal R must be switched on to enable the ”rear window wipe” function. The rear window wiper is switched on by pressing forward the wipe/wash switch to the first switch stage (in forward direction). The rear window wiper then runs at a fixed wipe interval.
An electronic switch (Hall sensor) is integrated in the rear window wiper for the purpose of detecting the park position
The ”rear window wash” function is activated by momentarily pressing the wiper switch or by pressing it beyond the ”rear window wipe” position.
Following activation, a wash program is triggered that consists of three wash cycles and two wipe cycles. Renewed activation is possible during the last wipe cycle. The wash pump is activated by the control unit for the rear window wiper.
The interval time of the rear window wiper can be programmed as follows:
The wiper switch must not be set in the ”rear window wash” position when programming the interval time.
A maximum interval time of 30 seconds can be programmed.
The rear window wiper is switched off when the rear window is open. After closing the rear window, the rear window wiper is not switched on again before it is switched off and on at the wiper switch or before terminal R is switched off and on.
The rear window contact is connected directly to the control unit for the rear window wiper. From the rear window wiper control unit, the line is routed further to the central body electronics control module (ZKE) where the rear window contact is evaluated for the antitheft alarm system.
If reverse gear is engaged with the rear window wiper switched on, the wiper switches from intermittent mode to continuous wipe mode.
A jamming protection facility is integrated in the control unit in order to avoid overloading of the wiper motor in the event of the wiper jamming. A jamming situation is detected by the Hall sensor integrated in the wiper motor and by an internal short-circuit detection facility in the electronic components. The wiper is switched off if jamming is detected.