1. Open the hood of your 750Li BMW.
2. Locate the engine oil dipstick. It is usually located on the right side of the engine, near the front.
3. Remove the engine oil dipstick and wipe it clean.
4. Reinsert the engine oil dipstick into the dipstick tube and check the oil level. The oil level should be between the "MIN" and "MAX" marks on the dipstick.
5. If the oil level is low, add some engine oil.
6. Once the oil level is correct, remove the engine oil dipstick and put it back in its place.
7. Locate the transmission fill plug. It is usually located on the bottom of the transmission, near the rear of the engine.
8. Remove the transmission fill plug.
9. Use a funnel to add transmission fluid to the transmission.
10. Add transmission fluid until it starts to come out of the fill hole.
11. Once transmission fluid starts to come out of the fill hole, replace the transmission fill plug.
12. Lower the car so that it is back on the ground.
13. Start the engine and let it run for a few minutes.
14. Shift through all of the gears.
15. Check the transmission fluid level again. It should be between the "MIN" and "MAX" marks on the dipstick.
