Here's a short step-by-step guide on how to perform a full service on an Audi A4 car:
Changing the Oil:
1. Lift the car using a jack and secure it with jack stands.
2. Locate the oil drain plug under the engine.
3. Place a drain pan beneath the plug and remove the plug to drain the old oil.
4. Replace the drain plug and tighten it.
5. Remove the old oil filter using an oil filter wrench.
6. Apply a thin layer of oil to the rubber gasket of the new oil filter.
7. Install the new oil filter and tighten it by hand.
8. Add the recommended amount of new oil through the oil filler cap.
9. Start the engine, let it run for a few minutes, and check for leaks.
10. Turn off the engine and check the oil level using the dipstick. Add more oil if needed.
Changing the Air Filter:
1. Open the hood and locate the air filter housing.
2. Unclip or unscrew the housing to access the old air filter.
3. Remove the old air filter and clean out any debris from the housing.
4. Insert the new air filter in the same orientation as the old one.
5. Reattach the housing, making sure it's securely fastened.
Changing the Cabin Filter:
1. Open the front passenger door.
2. Locate the cabin air filter housing under the dashboard on the passenger side.
3. Open the housing and remove the old cabin filter.
4. Clean out any leaves or debris from the housing.
5. Insert the new cabin filter with the arrow pointing in the direction of airflow.
6. Close the housing securely.
Changing the Fuel Filter:
1. Locate the fuel filter, usually near the fuel tank or under the car.
2. Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
3. Use a line wrench to disconnect the fuel lines from the filter.
4. Remove the old fuel filter and install the new one, aligning the flow direction arrow.
5. Reconnect the fuel lines, ensuring they're properly tightened.
6. Put back the fuel pump fuse.
7. Start the engine and check for any fuel leaks.
Remember to consult your car's manual and follow safety precautions while performing these tasks. If you're not comfortable or experienced with car maintenance, it's recommended to seek professional assistance.