How do you change glow plugs in 1.9 fiat punto?

To change the glow plugs in a 1.9 Fiat Punto, first, ensure the engine is cool and disconnect the battery. Remove any necessary components, like the engine cover and intake manifold, to access the glow plugs. Unscrew the old glow plugs using a socket wrench, and install the new ones, making sure to torque them to the manufacturer's specifications. Finally, reconnect everything, ensuring all connections are secure, and reattach the battery.