hello guys,
it's not an emergency, but a question for you how to find justice with the dealership.
yesterday i was changing ATF on Mercedes 300E 1989,
i have provided the ATF Fluid (Mobil 1, 8 quarts), as i know, the capacity of my car is around 8 quarts. After i got my car back, only at home i have noticed that they used only 3,5 quarts of fluid. I called them and they did confirm that they haven't drained the torque converter (even though i have a plug there and i know that it is supposed to be drained), also they told me that they never actually drain the TC. So i said goodbye and decided to research before demanding something . Is the TC and transmission pan a closed circuit? Can i call them and demand to drain the TC or refund my money (150$), i didn't do it myself only because i wasn't sure how to drain the damn TC. But paying 150$ for just draining the pan thats hideous!

Please share your advice with me, what should i do?

thank you in advance,
andrei