Seat Mii Electric Wiper Problem

I also own a Mii, though I haven't experienced precisely the same issue. However, my windshield wipers once behaved erratically. Does the turn signal function normally? Is the rain sensor working? A defective wiper switch could potentially affect multiple systems. Have you checked the relevant fuses?

Given that the fuses are fine and the turn signal is working, it does sound like either the wiper switch itself or the wiring harness leading to it. I suspect a visit to a workshop might be your best bet, especially if there's a stored error code. A proper diagnostic tool will pinpoint the problem. Good luck.

The turn signal functions as expected, and the rain sensor seems to be working because the wiper blade moves when it rains. I did check the fuses, but they appear to be intact. Is there anything else I should be checking before I take it to the shop?

Many thanks for the insights. As suggested, I took the car to a repair shop. The error memory indicated a defective wiper switch. The cable connection was indeed faulty, just as suspected. The repair, including parts and labor, came to about 95€. Everything works as expected now.