No. The car, especially the roof, is metallic, and will screw up the drone's compass setting. For the same reason you can't calibrate the compass in the immediate vicinity of a car. And think: would you really rely on the drone's accuracy for a Return To Home to land exactly on the pad, on the car roof? I suggest you watch a few Youtube videos that run RTH tests, to see exactly how accurate they are.I purchased one of those standard landing pads for my MA2.
Can I put it on the roof of my stationary car to land and take off automatically?