A friend has had big problems with his AUDI 100 C4 2.8l since yesterday.
It has carried out an oil change and already when oil draining found that only about 2.5 liters of engine oil ran out.
After that, he filled in about 5 litres of fresh oil and unfortunately had to find out that his AUDI is still starting, but the automatic transmission is no longer switched.

At the reopening of the oil drain screw he was not too surprised because nothing came.No drop of oil.
Since then, the AUDI and we've been puzzled.
That's why I'm asking you what happened? Where's the 5 liters of oil? Why isn't the gearbox switching?
Please help
MfG Ronny

PS: HUBREAM IS NOT TO BE SET BY EVERYTHING
