How do you change spark plugs on Audi a3 1.6fsi?

To change the spark plugs on an Audi A3 1.6 FSI, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil by unscrewing the bolts and carefully pulling it out, then use a spark plug socket and ratchet to unscrew the old spark plugs. Install the new spark plugs, ensuring they are properly gapped, and reassemble the ignition coils before reconnecting the battery. Finally, start the engine to ensure everything is functioning correctly.