read this thread Graham
atmsmshr figured out that the original dipstick is actually stopped before bottoming out by those little wings. makes about a half liter difference. I think mbvis went and checked the new distances and gave them near the end of the thread.
Thanks for pointing that out Barri!
I just checked insertion depth with my "tool". What is interesting, is that it is exactly 35 3/4" - same as length in ATSG diagram which would mean that IF MB tool could be fully inserted, it would just reach the bottom of the pan. Probably just a coincidence.
I have now marked my "tool" at 34.5" which I got from the link. Is that the insertion depth you get with your MB tool? ADDED: Ok, forget that - better to use MBVIS measurement and make 25C marks at 21mm&32MM and 80C marks at 66mm&77mm for dipstick that will hit bottom.
I lost just under 1L when I changed the adapter/plug. I also found a little in the TCM. Prior to that dealer had set level 40k km ago and there have been no external leaks. I should hopefully have the correct amount of fluid, but made the dipstick just to cross-check.
ADDED: Checked level cold (~30C) and then after run assuming 34.5" is proper insertion length.
Cold it was in range, but after run is was only midway between cold/hot marks. I see a big problem in measuring temperature with IR gun. Surface condition makes a difference. I got 90C on pan, but I think it picks up radiant heat from exhaust. I am not sure I chose proper connection, but at upper passenger side of rad there is smaller metal line. It was at about 80C +/-.
Seeing I probably need more ATF, I might see if I can get dealer to measure level for me when I pick it up Monday.
ADDED: Changed design and added thermocouple - link here