The biggest thing with Sport package is the EDC suspension and higher spring rates. In the US wel also get Adaptive Drive as part of Sport package which is also a big deal performance wise. Sport is an absolute must imo.

If you're towing anything heavy, the self-leveling suspension would help a lot I'd think. The Sport package won't do anything to help out in that regard. The springs will be of a higher rate, but that won't really make much difference relative to most tow loads.

I'd check if the self-leveling suspension can somehow be added without the 3rd row. You guys sure it isn't standard in the diesel?