Mercedes-Benz E-Cab 2013 Owners Manual - Manual (Page 136)

X Remove the cause of the obstruction.
X Switch the windshield wipers back on.
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
X Select another wiper speed on the
combination switch.
X Have the windshield wipers checked at a
qualified specialist workshop.
134
Windshield wipers
Lights and windshield wipers