Boris,
The S500 came with an engine oil dipstick, but only a plug for the transmission oil dipstick. The engine oil dipstick tube is towards the front of the passenger side of the engine, and the transmission tube is on the passenger side up near the fire wall.
Is it possible that you might have pulled out the transmission fluid and put engine oil back in the transmission? If this happened, don't worry, it can be corrected.
The S500 came with an engine oil dipstick, but only a plug for the transmission oil dipstick. The engine oil dipstick tube is towards the front of the passenger side of the engine, and the transmission tube is on the passenger side up near the fire wall.
Is it possible that you might have pulled out the transmission fluid and put engine oil back in the transmission? If this happened, don't worry, it can be corrected.