Had a look today, and found that the exit for the water down into the wheel arch was blocked with black "matter", as has been reported in other threads. It was a good half-fist worth of a wodge, so it's clear that the rain had been held up in this area, giving it time to get though somewhere else into the cabin.
Also, the plastic "gutter" on the drivers side under the scuttle plate was dislodged on the closed side, so all the water coming off the drivers side of the window was flowing back towards the middle of the car, before coming back again towards the exit. The "gutter" was actually full of water when I got down to it. Thinking about it, if the "gutter" was properly in place, the velocity of the rainwater running off it might have been sufficient to keep the exit clear of debris.
Anyway, I got down to the cable box, took it off and gave it a good clean on the sealing surfaces, and thought for a while whether I should use a bit of silicone around it. I was unsure about doing so, because I was thinking the seals on the box, along with the raised lip on the metal that the seals interface with, should be sufficient to keep running rainwater moving off the car, as long as the exit is clear, but in the end I put a bead of silicone along the inner seal. I found that the seal on this cable box wasn't of the sealing foam like in the doors, as I had seen reported elsewhere, but was better flexible rubber, and I was ready to use some butyl tape around it if it was, but was of the opinion that clearing the exit, having the "gutter" in the correct place, and having clean seals on the cable box should be enough. But like I said, I also used a bit of silicone too.
Not a big fan of using silicone, as someone (dealer) had done the drivers door with silicone some years back, and I had to redo it a few months ago because the silicone had broken down and was letting water into the cabin this route. It took me longer to scrape the old silicone off the door to clean the surface for the butyl tape, than the time for the rest of the work on the door, so that was annoying.
There was also some material around the outside of the inner (upper) edge of the cable box, down as far as the screw posts. It was brittle, and broke away and cleaned off quite easily. I thought it was perhaps butyl tape, whether there from the factory, or installed later, I don't know, but I didn't try to copy what it was trying to do. Hopefully, I've done enough between clearing, cleaning and siliconeing.
I didn't go near the bonnet cable grommet, as it looked sound.
Not using the car for 4 or 5 days, so might try to lift the carpet to dry it out, I don't think the newspaper and bricks are going to do it as quickly as getting air to all sides will do.
