OMG, you guys are being really cool about this. There has to be a lot more vehicles sitting on the lots with this defective part. This will get tracked down to a group of serial numbered parts that are defective. I hope there is a reasonable compromise made for you guys like your monthly payment being prorated. Of course this couldn’t happen in Feb.
These things happen with new models in every brand. Remember the IMS disaster Porsche had so the ac issue is very minor in the performance of the V8TT X5’s. The good news is the actual part works well as shown in 2019 models so it’s not a design issue.