Well I was sitting in traffic when I left work one day so I was flicking through the MFD settings just killing time and the oil temp showed "--- C". I kept on watching it then it suddenly came in at 50C. So whether it doesn't register any temp until then I'm not sure.After an hours drive it should show something so take it back and get it checked.
The dealers have to enable and turn things on when it gets to them during the PDI. I would take it to your nearest VW dealer when you have 5 mins and get them to check why its off. It maybe just a sensor or wire issue. If it was me i would be checking fluid levels etc just to make sure nothing else during PDI was missed
Mine shows the temp at around 50-60 C, takes 5 minutes or so.Back to the dealer, they'll sort it.