W210 Wagon Water Leak

[abh3]

My '01 E320 Wagon seems to leak water into the third row seat area foot-well when rained on in just the right (wrong?) way. This is a problem in Florida...

Before I climb in back and get the kids to spend the afternoon spraying the car with a hose are there any know issues these models have?

I can't see any obvious 'runs' down trim or over weatherstripping when looking at it in the rain and it seems to come and go... I had an old BMW 530i back in the day of Reagan and it had tiny (and hidden) drain tubes around the sunroof that would do the same thing from time to time. Are there drain tubes around the tailgate that I haven't found that need blowing out?

Many thanks and Happy New Year!

ABH3

'01 E320 Wagon
'88 300E Wagon
'99 Dodge Cummins 4X4
'73 Land Rover
'66 Alvis TE-21
Too many 2002's, ATVS, boats, motorcycles and other underused toys