My sister in law is considering buying a 2017 QX30 w/ 25k miles. Is there anything to be on the look out for (drivetrain, etc etc) before doing a test drive? Any issues (early armadas have bad exhaust manifolds) Do you love it? While doing a review of the forum, I see it's really a Mercedes vehicle. I tend to stay away from German vehicles for their notoriously expensive maintenance costs. Does that convert to this vehicle?