I took my Astra 56 plate (1.6 sxi) to a dealership yesterday for cruise control to be fitted. They fitted the stalk and clutch switch and all the wiring was in place. However, the cc would not work. They worked on the car for 4 hours but nothing. The dealership have fitted loads and are stumped. The dealership have been very helpful and treated me well and asked me to leave the car with them for a couple of days. They are offering me a courtesy car without charge. Any ideas?