Easy to tell if you have a multiplex car. If there's a huuuuuge delay between pressing the horn button and the horn actually sounding, or pressing the 'flash headlights' switch and the headlights flashing, then you have a multiplexed car
[url=http://www.peugeot206cc.co.uk/newowners?id=442]Ex owner number 442[/url]
As in, if you wanted to acknowledge another CC driver on the road, it'd be quicker to write them a note stick a second class stamp on it and mail it to them...