I don't know what diagram you have but the cruise switch is on the end of the turn signal stalk just like a Jetta SE or SEL would have. The part I put on is for a 2013 Jetta S with sunroof which comes from the factory with cruise.I have seen photos of the turn signal stalk with CC on it, but the VW diagrams show a separate (3rd) stalk that appears to be located below the turn signal. Which is it?
Did you (or could you) take any pictures during the process?
I just installed cruise on my boss's 2011 Jetta S with the same part numbers my 2013 used so it's probably safe to say your 2012 would use the same part numbers.I just picked up a 2012 Jetta S and am already missing cruise just a couple days in. Are those part numbers the same for the 2012 model?