Bought this car after an exhaustive research process into every car with 3 row. Did not want giant SUV (Suburban, Esalade) and biggest new Lexus did not have comfy back row. R-Class is extremely comfy in all rows. Middle row even shifts forward allowing additional room in the rear, if desired. Car runs very smoothly as one would expect from a MB. Middle row appears to have as much leg room as an S-Class and more head room. We opted for the center seat, which is good for child, but not full width. Cargo space with all seats in place is okay, but not great. Rear seats manually fold flat like a minivans. MB did away with the 5.0 litre engine. 3.5 is sluggish and a disappointment.
Love the panoramic roof giving the middle and back rows a glass ceiling. Unbelievably comfy and spacious seats in all rows. Auto open/close gate is nice. Backup camera (should be standard) is good as well. Park-assist beeps when close to cars in front/back and very useful.
3.5 litre engine is inadequate. Must've been a cost compromise, but this very large car need more power. Command (nav., radio, etc.) is small screen, not touch screen, not intuitive. Poorly designed even compared to our prev. 5-year old Lexus system. MB should be embarrassed.