I don’t know quite how it works but mine comes on when driving and stopped on a hill. I am still getting used to it to be honest, it releases when the clutch first starts engaging. I have never driven a car with it before, so it’s a bit strange to feel it release when you’re used to balancing on the clutch.Huh I thought when I bought mine that it did not have it but have noticed what seemed like a hill assist only when parked on a hill usually. Have not noticed it while driving but I could do with me being new driving a manual this being my first. But I'll have to test it out I still do get a little nervous taking off on hills.