I just moved out of a GLE 450 and liked it, but I love the Rivian. But if you aren’t going off road, don't need the size benefit of the R1S and are ok not getting software updates to refresh and add capability, the Merceds is a good option. I wouldn’t worry about efficiency at speed as you say...
I experienced the lack of internet connectivity issue Saturday, in addition my phone lost connectivity with the car and Tesla locations were used in mapping even though I chose the option to not include sites requiring an adapter. I reset the vehicle yesterday and all problems went away…for now...
Just did a trip from SF to Salt Lake. D+ worked great on 1-80 through Nevada and Utah. Very helpful. But expanding the roadways you can use it on would be on top of my enhancements list. Looking forward to it