Quando mi capita di accelerare per spuntare ci frizione schiacciata, la macchina tira fuori fumo

Increased fuel consumption, idling and shuddering while driving Instability in air pressure

Sale aviso en naranja de averia motor revisar inmediato.
Cuando esta un rato parado se apaga el aviso del cuadro y despues de unos km vuelve a salir y pierde fuerza

How often should a gearbox oil change be done on this car?

Advised that an earth from engine fusebox to the ecu is broken/ disconnected.