Had a 'beeping warning' yesterday while driving back home.

Apparently the 'total km' on the dash turned to '9995' and for every km it beeped again, when it got to '9999' it resets itself to '0'.

it didn't really bordered me but just wanted to know what's the total km for?

That's the trip meter perhaps?
Computer beeps when it is reaching the maximum number it can display to warn you it's going to reset itself. The Magnas do this too.

https://plus.google.com/u/0/105600713829543472974/photos/photo/6007987453262574946

No it's not the "normal' trip meter, as in the 380 you have the ODO, Trip A, Trip B under the speedometer while the 'Range', 'Rest time', 'L/Km', 'Instant L/km', 'Total fuel', 'Total Km', Speed Warning are under the rev meter.

https://www.dropbox.com/sc/a5q5eu6a3if5pra/BbDtqofrkb

That's the trip meter I meant. My original comment still stands. Data overflow.