After the special edition of Program 164 - hot red Ferrari for the ML-Class, ART unveiled the X64 Programm for the Mercedes GL-Class. ART updates the engine of the GL-Class so the power grows up with 20%.
The GL320 CDI grows up from 224 hp and 376 lbs-ft to 269 hp and 451 lbs-ft. The GL420 CDI from 306 hp and 516 lbs-ft to 367 hp and 619 lbs-ft.
The top-model, the GL500 is powered by a 6.1 liter V8 engine with an output of 462 hp (standard 388 hp) and 453 lbs-ft. The 0 to 60 mph sprint is made in 6 seconds and has a top speed of 158 mph.