The three-row GLS-Class is the biggest SUV Mercedes makes, sitting atop a lineup that also includes the GLE, GLC, GLB, GLA, and G-Class. This vehicle mainly competes with the BMW X7, Land Rover Range Rover, Cadillac Escalade, and Lincoln Navigator. A robust 3.0-liter inline-six turbo engine powers the base GLS 450 while an even more powerful 4.0-liter twin-turbo V8 engine powers the GLS 580.
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