Central Locking fault Please help!

You can almost guarantee it's down to a failing drivers door locking mechanism

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Sorry for the late reply and just ignore if you have sorted the issue. It's not that hard to do yourself just follow this guide. Obviously source a replacement module beforehand if you aren't up for trying to fix yours.
http://forums.vwvortex.com/showthread.php?1015107&osm=1#/topics/1015107?page=2.