Dead!

First time here and looking for some help. We have a 2011 RRS with 99,005 miles on her. The other day we got some message about "optimal performance" and the vehicle shaking. Parked it and called a tow truck. After sitting there for 5 minutes, I checked the oil level and the temp gauge, both were within normal limits. No leaks... yet! When the tow truck put the Rover on the flatbed, I could see coolant at the front of the engine and leaking.
Question, why when I try to start her, I have...

Dead!