I did have a chat to my mechanic about yuor water problem.

He suggested lifting your rear seat lower pad to see if it is wet under there, if not - no rear window seal problem.

He was fairly convinced it was probably coming from your A/C dumping condensate into the vent which is traveling down the rear vent system.

Apparently the condensate drains (one on each side) can do this - he said he has been replacing these more frequently on 126s over the past couple of years.

Anyhow, lifting the rear lower seat pad will narrow the problem down.

Cheers

__________________
1988 W126 420 SE

beware of fundamentalists!