How do you tune up a 2003 jaguar x type?

To tune up a 2003 Jaguar X-Type, start by replacing the spark plugs and ignition coils, as worn components can affect performance. Change the engine oil and filter, along with the air filter to ensure optimal airflow and lubrication. Additionally, inspect and replace the fuel filter if necessary, and check the coolant and brake fluid levels. Finally, consider running a diagnostic check to identify any error codes that may need attention.