It's apt that with Mercedes-Benz now a mass market brand, SUVs are much of the reason why. Apt in that the Geländewagen, which we can think of as the marque's first SUV, was never intended to be a luxury vehicle. As it became the G-Class, this remarkable 4x4's name was leveraged again and again, to the point where there is now a large line-up of SUVs, each of which has G as the first letter of its name. This report examines a selection of them.