I've also just popped out to mine, i see my case is Europa v5 for starters!
Anyway, at the top in the "search bar" with example text saying "enter address/poi", this is where i was trying to search for the postcode. Mistake?
To the right of this text box is a button and if you press this there are three options, search, address, map.
If i don't "search" and select address instead, then i am prompted with country and city text boxes. Press city, then i am promoted to enter city and the ptcd button appears on that keyboard in the bottom left corner.... this works.
Thanks for your help to decipher the crazy system. TOMTOM it is not!
Anyway, call to the van centre tomorrow askjng for v6 instead of v5!!!
As an extra....
1. Can the voice be changed?
2. Why isn't there a quick access nav mute button?
3. Car-net won't enable even though I've registered, enabled hotspot on phone, connected radion to hotspot, entered activation code and "error or failed" type message appears.