Hey Ps2cho, I know this is a fairly old thread, but I hope you're still around.
I have to do the same job on my daughter's 190E 2.6. I came across this thread and had a few questions if you still remember!
First, How did you make out with the sealing of the oil pan? did the sealant hold up? If it happens to me, I'm going to splice in the front piece of a new gasket with some sealant and only have to worry about it leaking at the splice cracks.
Second, In your pics it only shows the balance and hub attached together. Did you remove them that way or did you take off the pulley and balance first? Was it hard to pull off?
Third, was it hard to torque the bolt down? weren't you worried about breaking teeth on the flywheel or some other damage.

If Ps2cho isn't around or misses this, I'd welcome any other input from someone who's done this before!
Thanks