Good day, I own a Mercedes-Benz T1 209D (motor OM 617 2998 ccm) – an heirloom from my father’s estate. When I checked the oil level in the automatic transmission, I noticed that the oil level was about 10 cm above the markings and the colour of the oil was yellowish and not red, as I know it otherwise. So I left the oil off today. First of all I noticed that only about 4 liters came from the transmission, although according to data sheet 7 liters fit in and the oil level at the measurement So I first filled in only 4 liters (ATF IID MB 236.7) and switched the gears through every 5 seconds. After that, the oil level at the measuring rod was back at the running engine as before, i.e. about 10 cm above the highest mark. Deeply worried about what might be the cause of this condition, I am looking for an explanation here in the forum. I did something wrong when I left off, so that somewhere else 3 liters are “hidden” (or more, since the oil level above the mark (if the 4 liters I have filled in are above the mark)? Thank you very much!