As you look across the Mercedes-Benz SUV landscape, you might wonder which SUV is this German marque’s biggest. The answer seems easy, right? However, the answer rests on how you define biggest Mercedes-Benz SUV. Read on.
What Is the Biggest Mercedes-Benz SUV?
If you define “biggest” as the longest and widest, the 2025 Mercedes GLS takes top honors. But wait, isn’t the boxy 2025 Mercedes G-Class bigger? Well, only if you think height is the determining factor. If your thoughts on biggest pertain to seating and cargo space, yes, you guessed it — the GLS is the biggest Mercedes SUV in that regard. If you painted us into a corner, we’d present the biggest Mercedes SUV award to the GLS 3-row luxury SUV, but we would understand if others disagreed. Here are the numbers, split into related specs. We tossed in the biggest fully electric EQS SUV for fun.
Max. Seating/Cargo
| Model | Max. Seating | Max. Cargo (cubic feet) |
| G-Class | 5 | 68.6 |
| GLS | 7 | 84.7 |
| EQS SUV | 7 | 74 |
Wheelbase/Overall Length
| Model | Wheelbase (inches) | Overall Length (inches) |
| G-Class | 113.8 | 190 |
| GLS | 123.4 | 205.2 |
| EQS SUV | 126.4 | 201.8 |
Width/Height
| Model | Width With Mirrors / Without Mirrors (inches) | Height (inches) |
| G-Class | 86.1 / 76.0 | 77.7 |
| GLS | 84.9 / 79.9 | 71.8 |
| EQS SUV | 84.9 / 80.1 | 67.8 |
RELATED: What Does AMG Stand For: A Complete Guide to the Mercedes Model
Our Take
At the risk of repeating ourselves, our pick as the biggest Mercedes-Benz SUV is the GLS.
RELATED: Driving the 2025 Mercedes-Benz E-Class All-Terrain
