I have found that after it rains I find the drivers side footwell soaking with water. After some investigating with a hose I found that due to the door top not sitting properly vertical, the rain was coming off the roof into the gutter then draining out the drain holes by the door, onto the door top and down into the footwell. 2 small nut and bolts later in the drainage holes and it is all sorted. The water now drains to the other drain holes and this really was a 5 minute fix and very cheap. I love landy simplicity.

I have the same on my 90 300tdi might investagate that

you only need small nut and bolts and as long as you put the bolt head on the door side of the gutter so it doesnt catch on the door as you open it it works a treat.

A more permanent solution is to coat the rubber with sealant, (I used Sikaflex) cover with greased clingfilm and close the door. Let the sealant set and remove the clingfilm - perfect seal.