I'm looking at replacing my rear main seal as well, so any information is appreciated. I'm planning on just dropping the transmission, I hope everything is accessible from underneath the car with the transmission out.

I would advise against removing your vent host though. The host recirculates fuel fumes into the intake, and oil blow-by back into the case. If you pull it off, you're probably going to have an oilly mess all over your engine bay.

-Colin

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1981 240D
3.0L Turbo Swap, 4-spd
100% WVO hot filtered, under pressure, without filter bags. All those things that "can't be done".