I have a new 2018 Touring Sport Coupe.I have tried to set the volume vs car speed to no avail.The owners manual says that if is set to O, it is off.When I accelerate and increase my speed my volume doesn't change,same on decel, no volume change.I've had and used this on prior Bose systems in previous cars without any issues. I'm assuming it's possibly finger trouble,but the adjustment seems pretty straight forward.My first tech question on a three week old car.