In this episode, we drive giant-size luxury that's not afraid to get dirty… the Mercedes Benz G 550. Pat Goss brings modern tunes to a timeless classic. Lauren Morrison turns back the clock to fill ‘er up. And Hyundai takes aim at the Prius with the Ioniq hybrid. Quick Spin: 2018 Genesis G80 Sport, 2018 Porsche Panamera Turbo Executive, 2018 Ford Expedition.