Understanding the MPG display symbols

[reddamo12]

Hi folks,

A small thing but it's been driving me mental for a couple of weeks so I come looking for sanity. I have a 2010 Berlingo van, absolute cracker of a machine. On the central display where you see the radio and time etc, I can also check my mpg by the button on the wiper stalk. In addition to the average, there are several other symbols and there's no mention of them in the handbook and I hate going on the citreon website because I can never find anything useful. So any ideas ?
The symbols I see are:

Average MPG e.g 45 MPG - which is fine except that it fluctuates widely sometimes, showing 999 which I guess is in response to the fuel moving about

The next one is a lollypop symbol >> 2800 - I'm guessing this is milage since the last service?

Then I get the lollypop ---45.3----petrol pump symbol - but the 45.3 doesn't change at all

Then I have a car symbol >> 22mph - no idea on this one

Any ideas folks