Probably the least talked about topic was about the technical upgrades that the new model received. Among these upgrades, Mercedes-Benz quietly introduced the 9 G-Tronic and a new twin-turbo V6 engine.
Currently sold alongside the 3.5-liter V6 in some markets, the new three-liter V6 has an output of 333 hp and 480 Nm (354 lp/ft). Being some of the most hardcore horsepower and torque fans in the world, Brabus engineers decided that the new engine can offer a bit more ponies with the help of some ECU tweaking.
The result of that thinking is a Brabus plug-an-play ECU upgrade called the PowerXtra CGI B40, which increases the horsepower numbers by 50 and the torque by 70 Nm (51.6 ft/lb). The 383 hp and 550 Nm (405.7 ft/lb) result also brings a 275 km/h (171 mph) top speed. Not bad for a ten minute job in any authorized service.