Hard Top and Soft Top leak at the front rubber seal. - Mercedes-Benz Forum
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post #1 of 15 (permalink) Old 07-09-2010, 12:37 PM Thread Starter
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Hard Top and Soft Top leak at the front rubber seal.

Left side where soft top meets windscreen pillar water leak onto passenger seat of the right hand drive SL- i get same with hard top (but less) so i take it that the tops aren't the issue - all seals look perfect and no loose screws - i have rubbed vasoline into all rubber without clogging anything -
i saw a pdf about injecting silicone under seals - maybe i need to do this - or is there something obvious i am missing - what type of silicone would i use? are there any no-no's relating to the use of silicone?

Any ideas please to stop this water -

my last car was a 107 which was always leaking and i don't want my heart broken again

thank you
darragh
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post #2 of 15 (permalink) Old 07-09-2010, 12:58 PM
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I have the same problem with my '93 SL500 which is now located in the UK.
Whenever it rains water drips in from the driver side (LHD). It doesn't happen with the soft top.

My solution was to pop the hard top with the red button on the console.
Without removing the hardtop, place a piece of polythene bag or cling-film where the leak was occurring, and on the hardtop side of the polythene, squeeze a bead of black silicone over the seal, and then lock the top down again with the red button.
Leave overnight, release the top again, and then peel off the cling-film or polythene.

It should now be watertight

N.B. remember to clean the seal with solvent or alcohol before applying the silicone.

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post #3 of 15 (permalink) Old 07-09-2010, 01:43 PM Thread Starter
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That's a great fix and it may be the one i use Redliner thank you very much - however - mine leaks with both tops - so maybe i need to do something to the top of the windscreen seal rather than both soft and hard top seals - something so that the windscreen pillar seal is butted tighter to the hard and soft top seals??
I had a pdf i cant find which describes probably yours and other processes with the silicone ??

thank you
darragh
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post #4 of 15 (permalink) Old 07-09-2010, 02:01 PM
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So you are talking about 3 different mating surfaces here and a bit difficult to fix than just 2. I would try it with the soft top that leaks more than the HT.

Or better yet, leave the windscreen part alone, do the softtop and then the HT later, so each top will have its own 'fix' and they will mate with the windscreen.

Last edited by RKH; 07-09-2010 at 02:05 PM.
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post #5 of 15 (permalink) Old 07-09-2010, 05:11 PM Thread Starter
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Thank you RKG- are you saying the same procedure as Redliner so?

I just found this quote from a consumer guide relating to reliability of the 129-

"Water leak: Rain water drips on the starter causing failure requiring a redesigned water drain. (1998-99) Also, water leaks into the molding at the top of the windshield (1999), between A-pillar and soft top (1997), at the A-pillar on hardtops (1994), at the roof near the front doors on hardtops (1994), and from the outside mirrors (1990-95). "

mine is a 1999 - so there might be a particular fix for the left side - the side which locks down the top first -

Last edited by darraghodonnell; 07-09-2010 at 05:24 PM.
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post #6 of 15 (permalink) Old 07-09-2010, 05:13 PM
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Yes. And you may want to add some masking tapes to protect the surrounding surfaces in case some of the stuff squeezes out.

Last edited by RKH; 07-09-2010 at 05:16 PM.
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post #7 of 15 (permalink) Old 07-09-2010, 05:26 PM Thread Starter
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thank you -how much silicone will i use - a marshmallow size ,a marble size?
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post #8 of 15 (permalink) Old 07-10-2010, 03:29 PM
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HI, Dont think silicone is a good idea, do not use any product containing silicone. Will rot over time. You definitely better off using a Polyurethane sealant, good one available in ireland is "tiger seal". google it. Available from a good motor factors, put it behind slightly pulled back seal when hard top raised. close it tight and wipe away excess with white spirit, will need scalpel if dries. As I understand it, this is what dealer will do for this fix. Believe problem is common to a certain extent.

Last edited by lynns; 02-08-2011 at 03:26 AM.
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post #9 of 15 (permalink) Old 07-11-2010, 11:13 AM Thread Starter
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Dublin129 thanks - i have tiger seal - does it harden and dry like silicone -
I am really sorry but i cant let you away that easily-please read on if you don't mind-

Is this a fix that lasts do you think or a warding off of major messiness with sealant and seals and heart ache?
When you say behind the seal do you mean under the seal at the top of the windscreen or under the seal on the hard top?
Is the idea to sort of raise the seal at the top of the windscreen so it is butted more firmly against the top?
Just at the point where the leak is?
Are you talking an peanut m+m size bead or a good lash of it?

Kindliest regardations,
Darragh.

Last edited by darraghodonnell; 07-11-2010 at 11:21 AM.
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post #10 of 15 (permalink) Old 07-11-2010, 05:13 PM
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Aloha,
Check that the rubber gasket is seated to the hardtop. I just found that after years hanging in the garage with metal hanger holding over the rubber gasket it had pulled out a little and made a bump. Just released a few screws holding the metal that the gasket fits into and pushed it back in to fit. Look close before you spread any goop.
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