No version info displayed on my RNS 510 ?

Thanks heaps guys, I'll let you all know how I get on....wish me luck :)

I haven't as yet had a chance to attempt my SW upgrade to 5238 as recommended, however I noticed on my-gti.com that a few of the improvements listed here (Volkswagen RNS 510 Firmware Upgrade to version 5238 | my-gti.com), such as Clock Display if RNS510 switched off, Excluded Roads (under route options, Display OPS and RVC at the same time.... are already there on my unit. As I'm the 3rd owner of the car is there a chance that it may already have been upgraded? but if that's the case then why can I not get my SW version info ???

That list of improvements is not current or specific. More a laundry list of changes since the very first release.
You likely have firmware 2760, which does not show version info by default.
Upgrade and you will get that and more.

Thanks for that enlightenment, much appreciated, now I have the confidence to go for it