I don't have the PID just the standard speedo clock and display. Now all the digi part seems to constantly show is the time and mileage. Every now and then the outside temp shows but disappears in a few seconds. Is this usual or should the outside temp display constantly (like in my previous cars)?

 

The temp only shows briefly on the dash.

On mine if I press the left hand button on the clocks it will display the outside temp.

Yes, the left hand button toggles between time and temp. If the latter is close to freezing them it's displayed by default until the button is pressed.

Mine pings and warns me when the temp get's to 4 degrees (flashes a couple of times then goes away) but yes, any help you need on the speedometer buttons will probably be in the manual