Well, the BCU had quite a few errors
. Some are probably due to the low voltage it has seen several times.
https://scontent-ams4-1.xx.fbcdn.net...6f&oe=5F03ACD7
(kinda large image)
And I also checked the IPK, mainly out of curiosity. Which also had a fair few errors.
https://scontent-amt2-1.xx.fbcdn.net...c6&oe=5F021693
I cleared the errors after taking these photo's. When I got out of the car, it had zero errors left (check a few times with "read").
I also checked the settings, and I didn't see anything weird.
I didn't change anything, because I'm not 100% sure on what these options all do. But I did check whether the rainsensor was active (I don't have one) and it was disabled. I checked all the settings for the wipers, and didn't see anything weird or wrong. Everything looked logical to me. I wondered what would happen if I turned off "auto park wipers", but I decided not to do anything without somebody on this forum confirming that this might play a park.
I did notice I had 2 aribags errors, both the passenger seat. So I cleaned the connectors and the error didn't come back.
The battery is now back on the charger (again...).