My W211 turned over 75000 miles the other day and as a gift to me, it started turning its wipers on randomly. I've always kept the rain-sensing wipers in position one and they've always come on properly when it rains. Now, they are coming on whenever they feel like it (no rain) and making 5 swipes and shutting off. I've searched the various threads, but didn't see anything quite like this. Any thoughts?

 

its the rain sensor above your mirror its sounds like its failing

 

Same issue, when making turns it goes off.. no rain in sight.

 

Mine became weirdly sensitive to driving at night under streetlights after a windshield replacement.

 

Thanks for the input. I have to schedule a dealer visit for another reason. I'll see if they know. I'm sure they'll tell me for $300. ;-)

 

Don't go to the dealer, go to a Mercedes independent mechanic who will give you an honest answer. Maintenance at the dealer - yes, there are a lot of benefits to doing so. However, repairs and problem solving turn into a money pit at the dealership.