I am just starting to change the fluid in my 2000 C280 tranny. I cannot locate the drain bolt for the torque converter. I am turning the large nut on the harmonic balancer with a very large allen socket clockwise (viewing the car from the front) with one hand and looking thru the rectangular window in the bell housing just forward of the transmission pan for the drain bolt. I have been around three times now and no sign of a drain bolt or anything for that matter. There is a welded spot or two that has been ground smooth. I did this on my 1991 300CE and no problems there. What am I missing?

thanks

glenmroe
1991 300CE
1990 LS400
2000 C280