Thanks for your replay!
It's a bit confusing, retailers says rev3 but the schematics says 06...
Could i do the conclusion that if it has a micro SD slot then its compatible with Mega?
And in the ref i see this line
The most recent revision of the board exposes the 1.0 pinout on rev 3 of the Arduino UNO board.
So if i don't have UNO rev3 i wouldn't benefit from latest rev (6)..?