The Mercedes-Benz GLS can be judged for long-distance travel by looking at its space, output and running-efficiency figures together. Relevant information includes 2025 GLS 450 4MATIC FL: 5209 mm; 2025 GLS 450 4MATIC FL: 2157 mm; 2025 GLS 450 4MATIC FL: 1823 mm; 2025 GLS 450 4MATIC FL: 381 Ps; 2025 GLS 450 4MATIC FL: 280 kW; 1 more variants. For owners, long-distance comfort is about more than one number: a stable footprint, enough performance for overtaking and sensible energy use all make highway trips easier to live with.