Have you replaced the antenna seal? As mentioned, on my old 85' W126, it appeared to be good, but it wasnt. It caused water to get in my trunk and rear passenger floor. I replaced it and my water issue problems went away. Its the easiest thing to replace and cheapest. It may not be your issue, but I would not rule it out.

when I uncover the car in April I will do that, it's worth the $20, I will try everything as the car is worth it, and heck it's 24 yrs old why not

Well I have a 1984 500SEC. Took awhile to find the problem. I used three tubes of sealant(large caulking gun type) before I realized the water still came in.
Take a very close look at the drip moulding. Follow it's path from the front windshield to the rear window.
In my case as the moulding approached the base of the passenger rear window the rubber material had shrunk over the years just enough to let water trickle in.
I found this by carefully looking for the slightest dry water stains on the walls inside the trunk. I used a very bright flashlight at dusk so my eyes were not fooled by the daylight. I saw the faintest water mark way up beyond the filler tube. Had someone else spray water on the cars top, and sure enough, trickle trickle.
Resealed the drip moulding with more sealant. No more sneaky leaky.

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Selling used Mercedes parts on Ebay...always changing...
cdplayer51 take a look!
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Yeah, hopefully its your problem... but if your luck is like mine, its never nothing easy.

Let us know!

I should try that... A full seal replacement is the best option if you are paranoid, I will change the sun roof seal too. Is the roof seal hard to change?

The sun roof seal replacement on my wagon was a trying experience. It's a manual one. I haven't tried it on a power sunroof, so I don't know if that would be harder or not. There's a lot to be said for having the knowledge that all of your seals are brand new.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

IIRC, the sun roof seal on a 126 is easy, just pull out the old one and push in the new one.

-tp