Applying its B63S–700 kit to the SUV models, Brabus has extracted even more potential from the production 5.5-litre V8 Bi-turbo AMG engine.
Power in the ML variant is up from 536bhp to 690bhp at 5300rpm, while the GL63-based model — which has an identical power output of 690bhp — adds 141bhp over the already potent 549bhp. Peak torque rises in both versions to an electronically limited 708lb ft from 2000rpm, to protect the tyres.
Mated to an AMG seven-speed transmission, the all-wheel-drive ML-based model accelerates from 0-62mph in 4.4 sec. At 4.6 sec, the heavier GL takes two-tenths of a second longer, with Brabus’s VMAX unit restricting both cars to 186mph.
Immediately evident under the bonnet are the intake and charge-air pipes — finished in gold heat reflection insulation. To increase power, the motor includes two Brabus turbochargers with a larger compressor unit, which generate a higher boost pressure over the production turbos.