My High-up(2012) was recalled too to replace the transmission computer, as there seemed to have been faults with some of them.
I was not given a recall number and the work was carried out, unfortunately my manual gearbox does not work now and they think its now a software fault- not having happened before-, as the manual gearbox fails to work even after putting the original computer back.
On the High-up, the recall date was the 29/7/2014
Now waiting for magic!
The 24AH recall was originally a software update for the fan control unit but after finding out that it did not always fix the issue VW then changed it to a new fan control unit + a software update when the new unit is fitted
There is a choice of 2 units depending on build date