It's done
Finally it's easy but we need to ;
Unplug the most of the cable as possible, coolant, fuel and push to the right.
Unscrew the fuel folden cap in the front.
Low the engine to the maximum.
After that you can push the tank to the right and push it to the bottom.
You have access to the black support on the top. Unsrcew it and keep it away.
Now the tank come easily.
Put the new one.
On right to bottom.
Put back the black support.
etc...
Thank for your help guys