Open the hood of the vehicle. Pull the hood release under the dashboard.Go to the front of your vehicle, then unlock the hood latch below the hood.Once the hood latch is unlocked, you can already pull the hood up.
Locate the dipstick. You can find the dipstick of the engine oil on the driver's side of the engine compartment. The engine has a cover, and behind it, you will find the dipstick for the engine oil.
Check engine oil. Pull it out, and you will see the indicator on the tip of the dipstick. To check the engine oil, wipe the indicator first and put the dipstick back.
Next, reinsert it and pull up the dipstick again, and you will see the oil level.
Pulling the dipstick out of the engine.
When you are done checking the engine oil, you can put the dipstick back, and if you need to add engine oil, you will see a cap on the middle of the engine compartment. Just remove it and add the engine oil recommended by the vehicle's manufacturer, which for Mercedes-Benz in most cases is going to be Mobil1 0W-40.