Center Console Power Window Switches, Purpose/Design/Function

Purpose
The windows in the front and rear doors can be opened and closed with the center console power window switches.


Design
The switches are designed as pushbuttons.
They are integrated into the center console switch group (S21). The left front power window switch (S21s1) and right front power window switch (S21s2) have four switch positions, the left rear power window switch (S21s3) and right rear power window switch (S21s4) have three switch positions.


Function

Left front power window switch (S21s1)
Right front power window switch (S21s2)

Switch position Function
Middle position Non actuated position
Press switch (first catch) Manual down*
Press switch (second catch) One-touch down
Pull switch up Manual up*

* Runs only as long as switch is actuated.

Left rear power window switch (S21s3)
Right rear power window switch (S21s4)

Switch position Function
Middle position Non actuated position
Press switch Manual down*
Pull switch up Manual up*

* Runs only as long as switch is actuated.


NOTE:
The front power window switches (S21s1, S21s2) and rear power window switches (S21s3, S21s4) are designed as polarity reversal switches. This means that the polarity of the power to the motors can be changed (depending on the opening direction).
In the non-actuated position, both motor connections are connected to ground via the switch contact. This provides an electric braking effect for the motors.
Moreover, the front power window switches (S21s1, S21s2) each have one additional contact for the one-touch down feature.
This contact supplies the switch-on pulse for the all-activity module (AAM, N10).