We had a very stormy camp overlooking the sea in summer 2021, and forgot to bring the roof cover, so it turns out the driver's side took a good good soaking of salty spray.
Fast forward to 2025 and we started to get the warning bongs that the roof is still up, and the roof open icon on the control screen. Thanks to this thread, I identified the most rusty sensor (in fact the top bit fell off when I checked it).Then ordered the part. Cut the wires and soldered to the new sensor one by one. I didn't bother disconnecting the battery or removing the relevant fuse, just was extremely careful not to short the wires to ground or each-other.
1hr later and all working fine again. See photos.
Thank you to all for the instructions.