The 2008 Mercedes-Benz G500 Cabriolet occupies a specific place in the W463 series history, blending the traditional short-wheelbase body style with the mechanical updates of the late 2000s. This model year features the 5.5-liter V8 engine, which produces 388 hp and 530 Nm of torque, paired with a 7G-TRONIC seven-speed automatic transmission. As a true off-road vehicle, it maintains a permanent all-wheel-drive system equipped with three independent 100% locking differentials and a low-range transfer case. The exterior is defined by its electro-hydraulically operated fabric soft-top, which can be retracted to reveal a four-seat configuration.

Inside, the 2008 revision brought a modernized cockpit featuring a redesigned instrument cluster and the COMAND navigation and infotainment system. The cabin was standardly equipped with leather upholstery, power-adjustable heated seats with memory functions, and burl walnut wood trim. Technological features included bi-xenon headlamps with a cornering light function, the Harman Kardon Logic 7 surround sound system, and the Parktronic ultrasonic parking aid. For safety and stability, the vehicle utilized the Electronic Stability Program (ESP) and the 4-ETS traction system, which were calibrated to handle both on-road driving and technical off-road terrain.

Optional equipment allowed for further specialization, often through the designo program which offered unique paint finishes and interior materials like poplar or maple wood and high-grade leather in various color palettes. Functional options included a trailer hitch with a 2,850 kg towing capacity, multi-contour seats that allowed for pneumatic adjustment of the bolsters, and a heated steering wheel. Owners could also opt for a reversing camera, an integrated telephone interface, and various 18-inch light-alloy wheel designs. These choices allowed the G500 Cabriolet to be configured either as a utilitarian transport or a more personalized open-top cruiser.