The numbers are the service indicator.
If its going down its miles to next service (mine is).
You can reset it yourself if you do your own servicing.
The symbol display is the 'electronic' dipstick. Should be on the max.
(Always a good idea to 'dip' your oil aswell.)
The electronic dipstick can vary quite a lot though between starts.
Now an ex Berlingo owner, I have a C4
2010 (B9) Berlingo Multispace XTR HDi 112 - Kyanos Blue
Previously - 2002 (M49) Berlingo Multispace 2.0 HDi Diesel - Arctic Steel