Mines a D4 4.2tdi, 2010 model. I took it into the dealer recently to ask if there was any new gearbox software as I felt the box was struggling to make a decision at times (including some real transmission shunts).
They said yes and installed the latest update, and this has made things better. BUT, now the shift paddles do not work unless I press the steering wheel button to activate manual mode. Previously, from drive I just pulled a paddle and the box would shift, now I have to press the button then pull the paddle.
Apparently this is deliberate and is a feature of the gearbox update. Does anyone else have paddles that do nothing unless you press the steering wheel button to activate manual mode?