Vox did you notice any dirt inside the door?Every time I lower the front Windows, they come up with some "stripes"
the stripes are caused by build up of dirt on the top door blades. If the stripes are inside it is the inside blade, if outside then outside blade (most likely).
The rubber blades have a thin coat of 'flock' on their wiping edges which feels a little like felt but very thin.
Take the front windows down to their 'service position' which is when the glass disappears below the blades. Now you can run your fingers on the inside where the glass normally make contact. If the rubber flock is breaking up, then you have no choice but to replace the strips (expensive, come with chrome trim). You may just find leaves stuck to the rubber. Thoroughly clean along the wiping edges with alcohol, you will be surprised how much dirt and green stuff comes off.
When you have finished, raise the glass and with the door open, spray the outside of the glass with a watering can. If water is pouring out of the front or rear door drains at the bottom, then your seals are no good and letting water into the door cavity. It will not be long before you will be replacing the window regulator wire, and long term you risk corrosion along the door frame bottom edges.
The slot seal design is very poor and only makes contact on the outer 1mm of the seal along a very long length, which means it doesn't always seal. The design problem they have is increasing seal contact area using a different profile would increase friction on the window motor, which is already lifting a long and heavy piece of glass. As those slot seals age they lose some of their rubber flex which is the only thing keeping it in contact with the glass. Before I replaced both outside slot seals I tried out my new home steam cleaner (With the glass fully lowered!) by running it back and forth along the slot seals. It is surprising how floppy and springy they became afterwards. That gave a few months of relief from water pouring out of the door drains after rain.
Even with new slot seals and the inner door panels off, I could still see a couple of drip runs getting inside the door skin. If I took the glass down and gently pushed the outer seal lip inwards, the glass would seal - but that is never going to last.
There is something really wierd about how they mount the glass lifter mechanism. The bottow two fixing bolts are in slots, so you can move the bottom of the frame in and out a little. Unfortunately, the top 2 fixing bolts are in plain holes and you cannot move the top of the frame out to compensate for an old seal. Considering the glass is raised most of the time it is top adjustment you really need to push the glass harder on to edge of the slot seal. The inner slot seal is less important and is there to keep condensation out of the door skin and wipe the glass when you lower it.
My passenger door even with a new seal was still disappointing. As an experiment I managed to get a couple of flat washers behind the top bolts holding the lifting frame. That pushes the glass out about 1.5mm and the inner slot seal is still o.k. It seemed to stop the few drips I had, but I do not know for how long.
Water leaks into the door cavities must be one of the EOS's best kept secrets. It is difficult to spot, although a sudden rush of water from the door drains when you open a door after rain is a big clue. It is even quite tricky to actually see, because you need the inner door cover seal removed and the door card propped up with just the window motor connected.
