Where to add oil on 2000 545d?

To add oil to a 2000 BMW 545d, open the hood and locate the engine oil filler cap, which is usually marked with an oil can symbol. Remove the cap, and using a funnel, pour in the appropriate type and amount of oil, checking the level with the dipstick as you go. Ensure the engine is off and cool before adding oil, and check for leaks after refitting the cap.