Performance, power and 0-100 km/h
2025 Mercedes-Benz GLC 300 4MATIC has the quicker recorded 0-100 km/h time at 6.2 seconds, compared with 6.9 seconds for 2025 Mercedes-Benz GLB 250 4MATIC. 2025 Mercedes-Benz GLC 300 4MATIC has the higher listed output at 258 hp; 2025 Mercedes-Benz GLB 250 4MATIC is rated at 221 hp, a difference of 37 hp. The torque figures follow 2025 Mercedes-Benz GLC 300 4MATIC at 400 Nm and 2025 Mercedes-Benz GLB 250 4MATIC at 350 Nm. These figures describe straight-line potential only; they do not establish braking performance, ride quality, steering response or durability under repeated hard use.
Range, battery, charging and efficiency
2025 Mercedes-Benz GLB 250 4MATIC has the lower recorded consumption at 8.1 L/100km; 2025 Mercedes-Benz GLC 300 4MATIC is listed at 8.4 L/100km. Test cycle, temperature, wheel size and charging conditions can materially affect these results, so only figures measured on the same basis should be treated as directly comparable.
Dimensions, cargo space and towing
2025 Mercedes-Benz GLC 300 4MATIC provides the larger quoted cargo volume: 600 litres versus 500 litres, a difference of 100 litres. 2025 Mercedes-Benz GLC 300 4MATIC carries the higher towing rating at 2,400 kg, while 2025 Mercedes-Benz GLB 250 4MATIC is listed at 1,800 kg. 2025 Mercedes-Benz GLC 300 4MATIC is 82 mm longer overall. Exterior size is not a benefit by itself: a longer body may create useful room, but cargo shape, rear-seat space and ease of parking still require a physical inspection.
Price and overall assessment
2025 Mercedes-Benz GLB 250 4MATIC has the lower listed starting price at $44,850, compared with $48,950 for 2025 Mercedes-Benz GLC 300 4MATIC. 2025 Mercedes-Benz GLC 300 4MATIC leads in more of the shared headline fields, but that is not a universal verdict: a buyer should weight price, performance, range and utility rather than simply count category wins. The assessment is based on the specifications shown here; it is not presented as a two-car road test.