I was changing the auto-transmission oil of my 190E 2.3 and I noticed that it's hard to get into the torque converter to drain it also. I'd like to leave the torque converter undrained and simply replace the oil from the main pan. How much of the 7.0 quarts remain in the torque converter? The manual recommends 6.0 for flush and refill, but I don't know if this includes the torque converter.