The Mercedes-AMG GLS 63 has been spied undergoing testing in Europe.

The Mercedes-AMG GLS 63 has been spied undergoing testing in Europe.

Essentially a facelifted version of the GL 63 AMG, the model has a new front fascia with revised grille and restyled headlights. The rest of the exterior largely carries over but we can see a new rear bumper and restyled taillights.

Power will be powered by a twin-turbo 5.5-liter V8 engine that develops 557 PS (549 bhp / 410 kW) and 700 Nm (516 lb-ft) of torque. It remains unclear if there will be an S variant but, if there is one, it will use an upgraded engine that cranks out 585 PS (577 bhp / 430 kW) and 760 Nm (561 lb-ft) of torque.

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Mercedes-AMG GLS 63 shows its new face in latest spy photos