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  #1  
Old 09-28-2009, 02:52 PM
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Rear window sealing

Hi
I am installing a new rear window seal, i am having trouble interpreting a step in the manual.
"prior to mounting cover,fill upper joint of ornamental frame with MB window seal compound so that no water can flow under cover over back window".
Anyone done this?
Thanks

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  #2  
Old 09-28-2009, 05:45 PM
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I had mine reinstalled by a mobile window installer.
I removed the rear glass because the trunk was getting wet on the right side.

I discovered some rust, took care of that with POR products.

Had window clean with new gasket. all guy had to do was install it.

He installed it dry, said MB uses no sealant. rained the next night and had more water than before . this guy is off my list. and on the other list

so I used a 3M urethane sealant in a caulking tube. applied it under the rubber at the top of the roof, down the side and across the trunk about 10 inches to both sides. haven`t had a drop of water since.

Charlie
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  #3  
Old 09-28-2009, 08:23 PM
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I just did this job over the weekend. I actually ordered the Diesel Giant video (no not affiliated) before doing the job. It really was not too bad even for someone inexperienced like me.

You need to cut the old seal and pull it out with the chrome trim still in the rubber...do not attempt to remove it with a screwdriver or otherwise or you will bend it and never get it back in!

If you have never done the job, I highly recommend the video. No glue was necessary since the the windshield is pressure sealed.

Good luck!
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  #4  
Old 09-28-2009, 08:56 PM
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They sell Windshield Sealant at the regular autopart stores.

I do not understand the part concerning the Trim. As there is a lip that seals in the Car itselv and a lip that the glass goes into.

On mine the Trim fit into an exterior groove and while it retained the Rear Window there was no place for water to leak through so I put no sealant on it. But, sealed the other 2 areas.

However, do not do what I did. I used regular rubberized roofing sealant. It worked but it was awful messy and got on things including my read seat in small areas.

In any event I would as I did with my own rear Window seal it with something. Everytime you remove a window you riske damaging it. (I used those plastic tools for removing door panels.)
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Last edited by Diesel911; 09-28-2009 at 09:12 PM.
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  #5  
Old 09-28-2009, 10:50 PM
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I sealed my front windshield, first with some black windshield caulking that I got at the auto parts store. Still had a leak. Then I read about and ordered the MB stuff. The difference is that it is a non hardening sealant. Huge difference. It worked really well and was worth the money spent. A tube is around $29.50. It also comes with a nozzle that flattens out and slips under the windshield gasket. Be careful not to put much lateral pressure on the nozzle, as it can break. Push it along with your finger at the tip as opposed to pushing it along with the caulking gun. Once the nozzle breaks, the rest of the sealant is useless. It takes some finesse but is very doable. Phil, at the "Buy Parts" section on this forum can get it for you if you don't live near a MB dealer.

I have done the front windshields on both of my cars. I think that a lot of windshields get replaced when a good sealing job will fix the problem. And from what I have read here, if I was having my windshield replaced and the installer was not willing to use the MB sealant, I would tell him to just stop right there. In fact, I would not let him start.
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  #6  
Old 09-29-2009, 01:10 AM
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on the w201 chassis, no mb sealant is called for when replacing the windsheild rubbers

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