Suitably called the Brabus 850 ‘XL’, the tuned version of the GLS 63 produces over 300 hp more than the standard vehicle. Further performance figures are just as impressive, 1,450 Nm of torque and a top speed of 300 km/h drive the capabilities of the GLS to the max.
Responsible for the performance bump is Brabus’ 850 6.0 Biturbo engine with increased displacement, producing 265 hp (195 kW) more than the AMG stock engine. Brabus engineers increased the cylinder bore to 99 millimeters and fitted the engine with larger forged pistons.
Further increasing the stroke to 96 mm are a special special precision-balanced billet crankshaft together with forged high-performance piston rods.
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