Before you folks said why. Well to make a long story short this is not on my Mercedes. It is on my BMW that does not even have a tranny funnel.

I ran across this on youtube. https://www.youtube.com/watch?v=MsdPAadc9fY

I want to do a drain and fill on my tranny. So my question do you folks see a problem with pumping tranny fluid in the tranny return coolant line to fill the tranny. This surely be a lot earlier and safer then to craw underneath a running car. The car has to be running to check and fill the transmission fluid level if you don't have a tranny dipstick.

I am particular interested in hearing from those of you who have experience or doing this is or similar procedure before.

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987