Thanks ! true ! itīs on the top of the gearbox , well hide under the battery of my 146 JTD .
i was very confused because some time ago the gears become very difficult to change with the pedal fully pressed until become unusable ,and a local service, not a alfa romeo dealer, say that it was air in the clutch system , he bleed this and left it working correctly again but said that problem was the slave cylinder and it was inside the gearbox, and replace the cylinder could cost about 1000 Euros.
Now it becomes hard to use gears again after 6 months of use and i thought that bleeding the clutch could help me some time for the very expensive replacement, but in the top of the gearbox itīs very different and cheaper , probably i will change it next week.