I recently acquired a Peugeot 607 2.2 SE 2002 model with Monochrome Sat Nav installed.Everything works fine if you don't mind the fact that the Sat Nav is showing where you were 20 minutes before where you are now-if you follow my drift. I have cleaned the Laser Head and CD but this made no difference. Has anyone come across a similar situation with a 607 or 406 which have identical systems installed on earlier models. Peugeot technicians at my local Dealer have diagnostically analysed the system and tell me the problem is something to do with Speed Sensor Recognition-whatever that is !!!.They are willing to do more tests at the rate of £70 per hour to try and identify the problem-you bet they are-but surely someone on this site has had the same problem and can give me some clues where to start to sort out the Sat Nav myself. Any help will be greatly appreciated.