Interestingly, the only reason Mercedes keeps the E-Wagon in the states is for two reasons.
1) E-Wagon owners are the wealthiest MB customers, more than S-Class owners.
2) E-Wagon owners are the most loyal customers to the MB brand.
I know everyone says BMW should make an M5 wagon, but, I'd rather see an M3 wagon or even just a 340 wagon. It'd be cheaper, still large enough, and AWD will be offered but will also be exclusive model in its class with no competition (V60 T8 Polestar doesn't really count), if anything they could at least do a limited production run, but these are all just dreams