The car must be horizontal during measurements.
After turning off the engine, you must wait at least 3 minutes for the oil to drain into the crankcase.
Remove the dipstick and wipe it with a clean rag.
Then insert the dipstick into the guide tube until it stops. The oil level should be between the two marks.
Add fresh oil when the oil level approaches the lower mark. It takes about 1 liter of oil to raise the level from the lower mark to the upper mark. Oil is added through the filler neck on the valve cover.
Caution: Do not overfill the oil above the upper mark. Overfilling increases oil consumption and can damage the engine and catalytic converter.
[The original text can be read on the website: www.bmwman.ru]