I have a 2.0d sport and was unable to charge battery on the car due to location. I had a completely flat battery so I locked the doors from inside and finally the driver door manually with the key. The next day, with a fully recharged battery I was unable to get the key to open the door with the key in the lock. I ended up removing the cover from the passenger wing mirror, removing the indicator bulb and then using 2 wires I connected the battery into the bulb holder making sure of polarity, and then I was able to use the remote key fob to unlock the car. Hope this helps someone
John