leaky back headliner

A few months ago, my wife had a new headliner put into her 93 SL1. Now when
it rains, as it is doing today, the headliner is soaked over the rear
passenger seat where the glass meets the headliner, and it drips down onto
the seat.

I assume that someone was not careful with an upholstery knife and punctured
a roof seal from the inside?

From outside, everything looks tight. How can I seal this up so it does not
leak anymore? Obviously, the rain is getting in from the outside, but from
where?

Thanks.
marx404

<Outsource Bush!>

 

Actually, it should not have been necessary to use an upholstery knike or
any other kind of knife to remove the headliner. Of course, that doesn't
mean that one wasn't used.

Are there any other reasons you can think of that might be causing the leak?

 

Does the car have a sunroof?

 

No sunroof, and as I said, I there is no visible sign of point of entry for
the water to come into. washing the car does not cause a leak, only rain
from a certain angle. I am suspect of somewhere around the window molding
even though I see nothing.

marx404

 

Any reason why you can't take it back to the place that ruined to
begin with to have them repair it properly? Seems to me you shouldn't
have to come up with a fix if they warranty their work at all.

 

That would be smart, but yes, she has taken it back twice and they say they
have it fixed each time. So I would rather fix it right myself.

marx404

 

To find leak sources, I pressurize the car interior. Usually just turning on
the car's blower on high and closing all the windows is good enough
(recirc=off). Spray or brush soapy water on all the suspected exterior
surfaces and watch for air bubbles. This finds large leaks. To find smaller
leaks, add a surfactant to the soap. I use dilute dishwashing soap with a
bit of alcohol (surfactant) to find tiny leaks in plumbing. This concoction,
while good for finding small leaks, may damage the painted surfaces.
Test a small hidden area first. Perhaps someone can suggest a better means.
Oppie

 

I use foaming window cleaner to detect leaks around windows. Usually the blower
on high will work just fine.

James