It’s looks like you are enjoying your 2018 model year. It’s amazing how many changes and features have been added since my 2017 W222 and earlier years.
Hit the Home button on the left side of the steering wheel. Scroll over to the left until you see Service. Hit enter. Scroll down to Coolant and you can see your engine temperature.
@@WayneARobertson Will do, Wayne, and thank you. By the way, I have the same White exterior with cream / beige interior, mine is 2019 S560 :) Purchased it used, last July :)