I'm having a problem with our 1999 Volvo S70. Every time we turn the car off, the key is not able to come out of the ignition. It seems as though the button on the gear shift knob is pushed in when it should be out. If you play with the button on the gear shift knob, it will eventually come out and we are then able to take the key from the ignition. Does anyone know what is causing this problem and if so, what would be the repair? TIA Mark