You should be skeptical when your dealer told you you need a transmission fluid "flush". SkyActiv-Drive AT is designed a little differently from the most other automatic transmissions and it circulates engine coolant "into" the transmission for cooling. This means there's no way to use any ATF flush machine to hook up ATF lines and do the flush. Drain-and-fill is the only way to change our ATF and is the only method mentioned in the factory service manual.
Thank you yrwei52. I will print this out and bring it with me to the dealership and ask them to clarify.
Bon Scott