Automatic transmission: check the oil level.
Manual and automatic transmissions: visual inspection for oil leaks.
Vehicle with all-wheel drive: check the tightness of the distribution box and rear axle drive.
Drive shafts: check the joint shells for leaks and for damage.
Attention! Hand over old oil to a collection point. Never throw it in a landfill or trash, otherwise it may pollute groundwater. Old oil can be handed over free of charge to the place where you buy new oil.