The lock on the passenger side of my S80 is behaving really strange. When I try to lock the door it opens and closes a bunch of times, same with unlocking the door. It's completely random if the door locks or not. Today I replaced the doorlock actuator with another one that's supposed to be good. But it still doesn't work correctly. So either the other lock I bought is bad too, or it's something different. I found a place that sells new locks that should fit the car, but at 189 euros per lock I don't want to buy one, only to figure out that it's something completely different.

This is what's happening: