Version 3 - AWS 16 with adapter cable CHR + additional switch
The AWS relay is not mechanically and/or electrically identical to the interval relay installed in the vehicle.
Mounting of relay socket:
The cable connections from the relay base must be connected to the corresponding cables from the wiring harness. The AWS relay is installed in addition to the original. Version 3 differs from version 2 in that the interval switch line is not accessible and therefore the rain sensor must not be activated via the wiper switch Pos. "Interval" but via an additional switch.
To mount the switch, drill a hole at a position that is easily accessible for the driver, mount the switch there and make the cable connection.
IMPORTANT
Which version fits to your vehicle, you can find here :
Adjustment 
