Hey guys,,,on my e320 2001 on the wipers everything works fine,,but on the switch on the turn signal where you turn on intermiddant wipers sorry if i misspelled,,it does not seem to work or only has one speed which is horribly slow,,can any of you guys tell me why this is,,,buck

 

Have you tested the wiper motor?

The multifunction switch is a possibility, but it seems that if the wipers are only moving at one speed the motor would be the cause of that.