Mine leaks like crazy.. As long as I don't park with the front of the car lower than the back it all drains fine. Park nose down and it comes in on the drivers side column.

The PO had the car painted and the morons that did it painted the sunroof seal. Than the PO tore it trying to open the sunroof while I was looking at the car. One of these days I'll replace it.

Worse part is... The paint job is lousy to boot.

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.