What are the maintenance items for an Audi A6L at 20,000 kilometers?
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2017 Audi A6L 20,000-kilometer routine maintenance items: Air filter (external) maintenance, spark plug maintenance, air filter (internal) maintenance, air duct cleaning maintenance, throttle body cleaning maintenance, fuel injector cleaning maintenance, front/rear wiper blade replacement maintenance, tire rotation and balancing maintenance, four-wheel alignment maintenance. Engine oil and oil filter: Primarily for the maintenance of the lubrication system. The main function of the lubrication system is to effectively lubricate various components of the car engine to prevent excessive wear. The oil filter removes various impurities from the oil to ensure the normal operation of the lubrication system. The oil filter should be replaced along with the oil during an oil change. Under normal circumstances, the car should be serviced every 5,000 kilometers. Air filter: The air filter filters the air before it enters the cylinder, removing impurities, dust, sand, and other foreign particles. The cleaning and maintenance of the air filter depend on the usage environment. The gasoline filter is usually replaced after driving 20,000-25,000 kilometers. Spark plugs: Spark plugs are consumable items and should be replaced every 20,000 kilometers. In addition, components such as brake fluid, transmission oil, battery, throttle, fuel injector, and brake pads are inspection items during routine maintenance, and their maintenance depends on usage conditions.