W220 wipers intermittant
 

On my 2000 S500 I turn the lever and sometimes the wipers start other times they dont. More often than not they dont. I checked fuses/relays and cleaned still not working. The switch is good because whenever the wipers quit I can hear a slight click when I turn the key on and feel a nudge in hte wiper blades. Do I need to lube or change the wiper motor? Thanks for the help

Is this in all positions of the switch that they don't work, or just in the first position?

Believe it or not!! on that & most newer MB's there are 3-4 computers involved in wiper operation.. A scanner should point to the problem.