How to Check Oil in a BMW Z4
1. Drive your Z4 for at least ten minutes to warm up the oil. You shouldn't read the oil level on a 'cold' car, as it won't be accurate.
2. Put your Z4 into park on a level surface area, not a tilted driveway. Leave the engine running.
3. Press the '1' button on your turn signal stick until the dash reading says 'Oil'.
4. Press '2' on the turn signal to see the current oil level. It will show you a picture of a dipstick with the level on it. It will also tell you whether you need to add oil, and how much.