They are... but don't panic.
Because they're being replaced with something even better.
One year ago, Mercedes-Benz introduced a new naming strategy for their SUVs, giving each sport utility vehicle and crossover a "G" or "GL" prefix. For 2016 models moving forward, everything else will fall into place, too. The smallest SUV adopts the linking letter "A" to become the Mercedes-Benz GLA. The larger, mid-level ML-Class adopts "E" to become the Mercedes-Benz GLE. Most recently, the GLK midsize vehicle dropped its classification to adopt its new name (and a stunning new design).