I actually asked to upgrade to the new Q5 myself, cost about an extra 100 RMB per day, which felt quite reasonable. It had assisted driving, a huge gas tank, smart headlights, and quattro AWD. On a full tank you can easily do around 800 km. In five days we covered Banff, Yoho, and Jasper with zero stress. Banff National Park is definitely worth a second trip. Just keep in mind rental cars will always have a few minor issues—just mark them down and take photos and you’ll be fine. The first black Q5 they gave me had a problem with the buttons, so they switched cars for me, which took a bit of time but wasn’t a big deal.