Mercedes-Benz: Please help! Leaky sunroof

Hi,

We've been having torrential rain for the past couple of
days here in Vancouver, BC and I've discovered that I
have a serious sunroof leak in my '85 300SD. All four
footwells get wet.

The black felt-on-foam (or whatever it is) door opening
liner on the driver's side also gets soaking wet. I was told
that the most likely culprit would be blocked sunroof drains.
Is there an easy way to 'unplug' them? Could I pour in some
Drano or something? :-) How about trying to clean the drains
out gently with some piano wire or something along the lines
of that?

Or would I have to remove the ceiling liner and replace the drains?
How would I go about removing the ceiling liner?

Thanks in advance for any help!
cp

> Front or rear windshield seals can leak.

The seal comes away from the windshield in many
places, that should be fixed.
 

Will try, thanks!

cp