Looking downright demonic, the GLS63 with a heavy dose of steroids now has a whopping 838 horsepower on tap.

Brabus has worked its magic and managed to squeeze 261 horsepower more from the biturbo V8 AMG engine. In order to unlock a mighty 838 hp, the tuners had to increase the motor’s displacement from 5.5 litres to 6.0 liters and install upgraded turbochargers, among implementing other hardware tweaks.

Now with a jaw-dropping 1,070 pound-feet at its disposal, the heavily modified GLS63, dubbed “Brabus 850 XL,” has 510 lb-ft more torque than the standard version. At the same time, it also has more torque than GM's new 6.6-liter V8 Duramax rated at 910 lb-ft, and that's a diesel.

The extra power has lowered the 0-100 kilometres per hour (0-62 miles per hour) sprint time from the stock 4.9 seconds to just 4.2 seconds. The electronic top speed limiter, which is necessary due to tire limitations, is less restrictive now as it has been reprogrammed to kick in later, at 300 km/h (186 mph) instead of 285 km/h (177 mph).

Brabus 850 XL based on Mercedes GLS63
Brabus 850 XL based on Mercedes GLS63


But there’s more to this tuning project than the overhauled engine. Brabus has also developed a new body kit for the gargantuan 2.6-ton SUV. Beefier bumpers with carbon fibre accents are available along with a new front spoiler lip and a rear diffuser insert. A high-performance exhaust with four tips is also part of the package, as is the 23-inch set of wheels shod in 295/35 R23 grippy tires. The Mercedes-AMG GLS63’s air suspension has also been modified and it now has a new setting that will lower the high-performance SUV by 30 millimetres (1.2 inches).

Brabus 850 XL based on Mercedes GLS63
Brabus 850 XL based on Mercedes GLS63


Stepping inside the cabin, Brabus is providing a wide array of customization possibilities, including this brown all-leather cabin with braided-leather accents and checkered flag carbon touches. Buyers get to pick from a rich selection of wood and carbon inlays, as well opt for an aluminum finish for the pedals and door pins. The paddle shifters can also receive the aluminum treatment to provide a more solid feel for when the driver will want to manually switch gears of the GLS63’s seven-speed transmission.

This particular Brabus 850 XL was built to order for a client, but you can have one just like it, or ask the tuner to customize it in a different way.

Source: Brabus

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