2015 MS, auto wipers working fine. About the same as on my 750li.
Several posts here claim basic autopilot can't change lanes without disconnecting, but it can! Just put on your turn signal and it will automatically change lanes when clear to do so. Only changes one lane at a time though. You have to turn off the blinker and turn it back on for each lane you want to move over.
I trust basic AP on the highway and in stop and go traffic, but it gets sketchy quick if:
1. There is any type of construction
2. There is a close concrete barrier on the left side of the lane (drifts towards it even while the radar sensors are showing yellow and red)
3. There are any significant curves (gentle curves are no problem).
Sometimes it doesn't center in the lane. It tends to be too far to the right. When you have a semi in that lane, it gets un-nerving. Usually you can move over and reset it and it will be fine.
Regarding the latest updates (which I installed), I can't really tell much difference in the AP. It nags me about the same, and the nag can still be easily defeated with some light weight on the steering wheel.
I've heard you can use your cell phone as the weight and wrap it to the steering wheel with the charging cord.