Moisture under the airline rail in the trunk.

Christian said:

At Christmas it was very wet in Germany and I drove about 1500 km in the rain.

When I arrived home, I wanted to install my DIY rubber trunk mat and unscrewed the airline rails. To my surprise, the screws on the underside were wet. How does water get in from below?

It is noticeable that both the rail on the underside and the screws are fitted with a seal.

Has anyone observed anything similar?

Click to expand...

Christian said:

I have now taken a closer look at the moisture under my airline rails in the trunk.

If you remove one of the rubber plugs under the trunk mat, you can look through the hole directly at the undercarriage. See photo. I then inserted a pin into the same hole and photographed it from below. It is now clear that moisture gets in at this point when it rains, as the trunk floor is the underside of the vehicle when viewed from below.

Now I suddenly realize the sense of sealing the cavity!

Click to expand...

ECrider said:

Thanks for photos. Will have a look at mine whenever it is free of junk.

What will you fill the cavity with?

(reminds me of film star Phil McAvity)!

Click to expand...