I have looked several times through the forums for an answer to this question without finding one so when I finally figured out a way I felt I should inform anyone else with the same problem - it is soo low tech. I won't go through all the details but on my Laguna 2 Estate with lots of gadgets the lock button became more and more difficult to function. When it finally stopped completely, I found it was impossible to lock the car. The central locking button works fine but if any door is opened they all unlock. I have read posts that say you can push the button for the cental locking and then exit a rear door that you have left open but it does not work. The Fix - I don't know if it is standard on all Laguna 2's but with mine the windows can be operated for 15 seconds or so after you remove the key card. This feature is necessary. When ready to lock the car, leave the card in the reader and lower the driver's window. Get out, lean in the window and remove the key card. Push the button to close the window and then the button for the central locking and hurry up and get your arm out of the way of the clossing window. Maybe it would be better to push the lock button before the window button but I have remarked to myself when locking it like this tha it would maybe be prudent to put the key card in your pocket after removing it and before pushing all the buttons because if you bump your elboe and drop the keycard inside it will be difficult to get it back.