 I've switched from Mercedes. Handling is nicer, not as nice as BMW though. Cabin is very quiet. First impression is amazing. Nicely designed and finished. As soon as you start driving it you realize run flat tires destroy the comfort you may like from Mercedes. Head up display, as Paul already mentioned, produces ugly glares on a windscreen, right in front of you, distracting and destroying the whole experience of having a head up display technology. The best you can do when the glare comes up is to use a paper towel or something else to cover it up. Turning it off doesn't help as glare is a reflection from the HUD optics, not an image from the projector. Driver assistance package seems like an interesting enhancement but the car doesn't fully stop itself as advertised. You better read about all the limitations etc. The last one and a very annoying issue it the air-conditioning. The level of the noise the funs produce on a sunny days is hard to bear.  If I had the money in my pocket again I would seriously consider other vehicles like GLS or XC90. Perhaps this is what I'm going to do. Wait for the new GLS and trade it in. Good luck.