Two trim levels make up the GLS-Class SUV lineup. The GLS 450 4MATIC is the entry to the range and it comes standard with a turbocharged 3.0-liter in-line six engine. The top of the range GLS 580 4MATIC comes standard-equipped with a monstrous twin-turbocharged 4.0-liter V8 engine. Both of them are mated to a nine-speed automatic transmission.
Standard convenience features are inclusive of a hands-free liftgate, remote start, keyless entry, and push-button start. Dual-zone climate control and 64-color ambient lighting are also standard. Infotainment inside of the GLS SUV is up-to-the-minute and includes two 12.3-inch screens. The second screen enables MBUX that enables navigation, Bluetooth streaming, Apple CarPlay and Android Auto, and SiriusXM. A thirteen-speaker Burmester sound system is standard. Safety features at a standard level are inclusive of a surround-view camera, active park assist, driver-attention assist, blind-spot monitoring, and adaptive braking technology.