It's a weird one to be sure. Yes, on Nav Pro, it can show the speed limit (where known) for the road you are currently travelling on, via it's stored Nav database (nothing to do with sign recognition). It's a pity these signs can't be translated across to the MFD like on the "proper" Traffic Sign Recognition (TSR), as it would then be in your line of sight and you wouldn't have to look across at the Nav screen. It would also make use of the colour MFD screen which at present it prettymuch displaying everything in greyscale, so It would be nice to have a little spash of colour !
TBH, I'm totally bamboozled as to why TSR seems pretty much standard on the continent when ordering Lane assist (you must have the "A5" camera installed at the top of the windscreen), but in the UK it's pretty much hit and miss ?
If it was that the system wasn't calibrated for looking at signs on the left (rather than the right) I could sort of understand it. However, its' been reported on various forums that some GT's with Nav Pro and Lane Assist have come with TSR active yet most haven't. Why in gods name Lane assist isn't even available on the GTD and GTI in the first place is another mystery, as it's selectable elsewhere.
At the time when I ordered it (to have it removed later), VW UK said it was something to do with incompatibility of the A5 camera with the Xenon headlights, which is bull, as the headlights when specc'ed on a GT or SE etc. are exactly the same units, so what exactly is the problem ? I doubt VW even know.