♪ high up in the atlas mountains of morocco. have you seen this road we're going down? ♪ there is no relief for the brakes. we'll put them to the test today. all right, let's move out! [ ross ] we're pushing the ats brakes to the limit. going as fast as we can down the hill. we are making these sharp turns, slamming on the brembo brakes. [ derek ] it's like instant response, incredibly consistent. this is the challenge, machine vs. mountain. [ male announcer ] the all-new cadillac ats.