Wipers not working
Hey guys, I have been having some issues with my wipers. I recently took my car to get serviced (they replaced a pulley on my motor) and it immediately started having electrical issues when I got it back. Somehow the issues managed to fix themselves but originally my back turn signals weren't working, the headlights would stop working occasionally, my check engine light/long light/break light indicator was on my dashboard, the engine's fan wouldn't turn off, and my interior lights weren't working. As happy as I am to see that it's now magically working, my wipers have now decided not to work. They won't turn on on any setting. Does anyone know what might be wrong or what steps can I take to test them? They were working while the rest of these issues were happening.
Thanks for all your help!!
Mercedes C350 2008