I don't think the rattling is coming from the actuator for me, there is nothing loose that would rattle by the look of it.  It's definitely inside the car 

Greeting!
I read your experiences. I had a situation, after I bought a car, 2 months passed and I started to hear buzzing in the dashboard. I took the car to an authorized service center where they said it was the fuel hose that had fallen out of the reservoir. After I got home the buzzing was heard again. After that, I went to the service center again, where they said that they would take the entire board out and disassemble everything to solve the problem. However, the hose "fell out" from the bed again. In the end, I went to another service center where they found the problem in 2 minutes. The buzzing was from the interior mirror plastic that covers the rain and light sensors.