Hi there you need the radio code ,as you will need to disconnect the car battery for 5 mins and if you vehicle has sat nav ,before you disconnect ,the battery ,you need to wait 2 mins after you have switched the ignition off ,this is so the sat nav drive can shut down,after 5mins ,reconnect the battery ,enter radio code, run the engine till warm, also while you are waiting for the engine to warm you will need to set the electric windows,,make sure all the windows are up,then in turn hold the switch up for each window for 10 secs this will program the windows, if you have a sunroof as well, make sure you button is turned all the way over to the left,press and hold the centre button until the sunroof makes a noise then you need to let go and soon as you let press the button again and hold the button untill the sunroof has opened and closed and stopped, then let ,this will program the sunroof,then check to see if the air con is working on both sides,if not remove the heater panel and check the panel connections,refit connector then see if it works, if not its possable that theres a fault with the panel or the mixer motor ,to replace the mixer you have to remove the dash, hope this helps.If possable let me know how you get on.
mark, November 2008