Hello, after using the search function on the topic of four-wheel drive and reading various forum posts, it makes me feel that something with my four-wheel drive can’t be right: I drove up a small climb on a slightly snow-covered road on the weekend. I already gave a little bit more gas to see how the car reacted to it. Result: The front wheels started to spin! Whether the rear wheels could be driven at the same time ic Now, of course, I would be interested to know if this is so normal or if the car should have reacted differently? Above all, however, would I like to know how to check the correct function of the four-wheel drive itself? – Is there a simple test for “everyone” that clearly confirms whether the four-wheel drive works or not? XC90, D5, built in 5/2005