Press the Map/Pos button to enter navigation mode.

You can also press the Pos button on the head unit itself.

Press menu and then select how you want to navigate (address, POI, postcode etc)

Select the city your address is in, or if it is already showing, just scroll down to enter the street name.

Select the street name to enter a new street. The same method is use for postcode changes.

Start entering the letters of the street. The remote control is easier than the head unit.

As you type, only the available letters will remain on the screen.

If you need to add a space, there is a space button at the bottom.

If you don't get an exact match or there is a small number of matches (in this case 9), you can move to the list button and select one of the options from there rather than continue typing.

Once I select the street it may then ask for further information to get you closer to your desired destination.

On this second screen select the area you want to be in. This is important as their may be two or more Old Streets in London.

Input the house number, intersection or just select entire street.

Press enter to confirm.

It should then say calculating and after a few seconds, start telling you where to go. Happy navigating. :)