Called the Brabus G V12 900, this Mercedes-AMG G 63 uses a V12 engine instead of the V8 and boasts many other upgrades. What's it worth to you?

Together these measures make the BRABUS GLK V12 the fastest street-legal SUV in the world. But it is not just the incredible top speed of 322.3 km/h (211 mph) that are the basis for its fascination.

The addition of the 5.5-liter V12 from the Mercedes S600 to a G-wagen by BRABUS is the sort of wild idea you'd respect but, honestly, it's nothing amazing. Mercedes tuners love swapping motors.

Pegged as the ‘ultimate wolf in sheep’s clothing,’ Mercedes tuner Brabus has unveiled its new V12 Biturbo C-Class sedan that it plans to present at tomorrow’s Frankfurt Motor Show.

Brabus has truly worked its magic on this V12-powered Mercedes-Maybach S-Class, which features a murdered-out exterior and a lively cockpit ...

But certain Mercedes-Benz drivers still want more, and Brabus is happy to oblige. Unveiled at the Geneva Motor Show in March, the $250,000 S V12 S Biturbo transforms the latest Mercedes-Benz S600 ...

But anyways, time to see the Brabus-prepped G-Class in detail. Under the hood of the German SUV lurks a modified version of the V12 Biturbo engine from the latest Mercedes S 600.

First the sedan, then the coupe and now the cabriolet: With the 800-hp (788-bhp) / 588-kW BRABUS 800 V12 Biturbo twelve-cylinder high-capacity engine in the body of the open-top Mercedes E-Class ...

Based on the new-gen G-Class, it’s offered in a limited production run of 10 and packs a V12 engine sourced from the Mercedes-Benz S600 L, where it produces 530 PS (523 HP / 390 kW). Thanks to ...

The people of Dubai are well-known for their love of speed, which is why Brabus is sending its 200-mph, V-12-powered Mercedes-Benz GLK to the Dubai International Motor Show, held from December 16-20.

That tuner is, of course, Brabus, and its clientele is on the same page when it comes to displacement: the more, the merrier. Brabus' answer for that subtle, understated clientele is the G V12 900.

Based on the new 2010 Mercedes E-Class W 212, the E V12 features a 6.0-liter V12 biturbo bored out to 6.3-liters producing 800 hp and 1420 Nm of torque (it’s electronically limited to 1,100 Nm).