2015 Mercedes-Benz GLE Coupé 450 AMG Sport is basically an new ML Coupé.
However Mercedes whole SUV range is being renamed into GL + final letter indicating the lineup hierarchy:
- GLC (next GLK)
- GLE (next ML)
- GLS (next GL) …
This vehicle is the coupé derivative of the ML = GLE, which is the E-Class level SUV (just like the X5 is the 5 Series level SUV). And since Mercedes does not anymore distinctly name its coupé derivatives (e.g. CL became S Coupé), this is simply called GLE Coupé (unlike X6 which is not called X5 Coupé).
So it’s definitely an BMW X6 competitor!
Image source: NetCarshow