The Cruise control on our 2.3 has shown all of these symptoms, and also rockets away to way beyond the previously set speed. Furthermore it seems very slow (30 Seconds) to switch off, either by braking or on the column switch. I have only used it once, on an early morning motorway drive, and thought the problem was my lack of familiriaty with it, having opnly briefly read the instructions when we got the car. Is this a problem confined to 2.3s ?