If you think the Porsche 911 is the champ at incremental revisions through successive generations, then you should have a look at the Mercedes-Benz Geländewagen, whose features change on a scale of geologic, not automotive time. We’ve had a peek at the 2013 G-Class and its new LEDs and mirrors, and at a camouflaged AMG version on test. That AMG, however, will be getting more than new trimmings when it arrives later this year: the twin turbo, 6.0-liter V12 from the SL65 AMG will be tucked under its bonnet. It’s the first time the G-Class has gone with a dozen cylinders. Funk Flex