I just bought a 2015 Q7 3.0T, 73,500 miles. Check Engine light appeared and coded as Mass Air Flow Sensor. Checked YouTube tutorials, so I KNOW where everyone says the MAF housing/sensor should be, but can’t locate it. I removed the large air hose from both ends (air filter side & engine side)...couldn’t see it. Looking for the wiring harness as a sure-fired way of locating, but to no avail.