My wife has a Cooper that has had a problem with the ignition. When you push the star button all the dials and lights come on there is then an audible click but the engine doesn't fire uo, Sometimes if I rotate the steering wheel it will fire up. Recently I've had to use jump leads which it the cooper starts first push of the button. As such I don't know whether it;s the battery, or an ignition glitch. Anybody out there with advise?