In May 2023, I bought a 508L driving pleasure model, and now it has run 28,000 kilometers. It's time for the fourth maintenance. During the second maintenance in January 2024, I replaced the air filter and the air conditioning filter. In the third maintenance in July 2024, the engine oil and oil filter were changed. For the fourth maintenance, what should I replace? The maintenance manual shows that, in addition to engine oil, oil filter, air conditioning filter, and air filter, spark plugs and brake fluid also need to be replaced. Are these necessary? Is it necessary to replace the carbon canister? Thanks!
