In the last years, most of the automatic boxes do not bring level control rod, both the change and the oil control is carried out with a specific tool for this purpose, it only has a drainage cover and for it the new oil is introduced, when emptying it will evacuate approximately about 4/5 liters and this will be 70 % of the total content, the rest will always be left by the rest, the rest will always be left Once Elaceite used is extracted, the same amount is measured and injected.
While do not have a pèrdida and less than 50000 km. You should not worry about measuring it.
In case of having passed the kilometer indicated, the impurities filter will be changed, I recommend that you recommend it to a specialized service, this is not for fans.