The Mercedes-Benz GLS is the German luxury brand's full-size SUV and the pinnacle of opulence. Unlike the compact GLC and midsize GLE, it doesn't offer a coupe variant or a plug-in hybrid powertrain. The entry-level 450 4MATIC model is powered by a 3.0-litre six-cylinder engine, while the 580 4MATIC model boasts a 4.0-litre V8. Also featuring a V8 engine are the Maybach 600 and AMG 63 models, although these two pack more power.