I live at 6700 ft, so I'm sure the 3.0 struggles a bit more for me than if at low elevation. That said, we rarely drag the camper out in the mountains. We're usually going to lower elevations for better Jet Skiing.

BMW really got the transmission tuning right on this vehicle. The engine seems more powerful than it is because the trans adapts very quickly to avoid bogging down. My wife's E83 they didn't get quite as "right".

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)