You can buy a decent used car here, probably for less than you would pay in money (not counting time and aggravation) just in the process, apart from the value of the car you're bringing in.
On top of that, I don't know what it would be like importing a car nowadays, with the import restrictions that are in place. Would they block something large like that, which is assembled and sold here, to someone who can normally bring things in on their residency? Would it be different for tourists? You might be told you can and your car sit in customs when it arrives for months not getting approved.
Then you have replacement parts to think about. If you're going to be here a couple of months, maybe not such a bad deal, depending on what you want it for. If it breaks down while you're here, I doubt you're going to find parts for it here, and possibly no one that knows how to work on it (of course, that's always a problem). The longer you have it here, the more likely that is to happen. See paragraph above about import restrictions.
Also, I wouldn't bring down (nor even buy here) a very big car if you're living in the city. Parking spaces are small and the buildings themselves are difficult to navigate at times even in something small-mid-sized like my Megane. It's possible with bigger cars but I wouldn't want to deal with it.