SunnyCHA, first of all where are you located? In North America or In Europe?
From what I read earlier this week the GLE models in NA will go on sale sometime in August if you want to the plug in edition you might have to wait a few weeks after that. As for Europe they don't go for sale till September.
It'll be a while just sit on it until the cold comes back. I talk to my dealer in NY and they have no clue on the exact date. He did mentionn that the info session has been scheduled for any of the dealers yet.
Caper, I read the same on a few publications but tracing back to other new vehicles they are always wrong or off by a good couple months.