Per Autoweek today, looks like the next GLE could maybe be a '20 instead of a '19? This is from a discussion of the CLS53 model, replacing the current 43:
"The GLE midsize crossover is another candidate for a 53 model. The GLE will be redesigned in 2018 with a likely U.S. on-sale date in early 2019. The AMG model would come after that."
I was hoping it was coming out next Summer as usual, as I'm itching to replace my '12 ML. The strong likelihood that it will get the new straight-six is a big plus and worth waiting for, IMO.