W123 Leaking Trunk Lid
 

I am collecting water in the perforated area on the trunk lid. After a rain, when I open the trunk lid, water start pulling out from the holes in the under portion of the trunk lid, the trunk gasket is fixing good, I cannot figure out where the water is coming from and how it is getting in the perforated area. As soon as i open the trunk lid the water that was collected in the perforated portion of the trunk lid, start pouring into the trunk. I am open to any suggestions, there is no water in trunk well areas. BTW I am referring to my 83 300cd.

HAd the same issue with my 85 CD. I took off the gasket and cleaned it and the metal where it meets, over the years crap had collected under the seal that you could not readily see. Put it back on and tested with a hose and it worked. Had plenty of rain storms since and it's been dry. My gaskets are all due to be replaced on both my 300's but this was a good temp work around.

X2 quite likely

Also you might find that the trim on the outside of the bodywork is also a bit loose - this can collect the water and wait until you open the boot and then - hey presto! It leaks into the car...