1. Loosen the clamps and disconnect both hoses from the heater tap nozzles from inside the passenger compartment under the instrument panel.
2. Loosen the clamps and disconnect both hoses from the heater tap fittings in the engine compartment.
3. Loosen the two nuts securing the heater valve.
4. Remove the heater tap from the bulkhead.
5. Remove the holder of draft of the crane of a heater.
6. Disconnect the rod from the heater valve lever.
7. Remove the gearshift lever cover from the floor tunnel lining.
8. Remove the floor tunnel lining.
9. Loosen the screw securing the floor tunnel lining at the rear of the tunnel.
10. Remove the floor tunnel lining by sliding it back.
11. Remove the internal ventilation duct by disconnecting it from the heater housing.
12. Disconnect the wires from the heater motor.
13. Disconnect the wires from the heater resistor.
14. Unscrew the two fastening nuts on the right side of the heater.
15. Loosen the two fixing nuts on the left side (a wire is fixed under the bottom nut "masses" heater) and remove the heater with the control panel.