The windshield wipers on my 2004 C240 4matic only work on the single swipe mode. If I push in the left control arm, I get a single swipe. If I twist the control to the intermittent or the continuous setting, NADA.

The windshield washer works and the wiper will swipe numerous times. So the wiper motor is good. Someone said that I need a new SAM module. I do hear a clicking coming from the drivers side dashboard when the car is first started. Maybe a bad relay??

Any helpful suggestions will be appreciated.