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  #1  
Old 03-08-2013, 06:22 PM
po7553
 
Join Date: Mar 2010
Location: Las Vegas Nv
Posts: 28
window limit switch

I was wondering if anyone could tell me how to test window limit switch on my 1992 300 sl and how to take off exterior door trim at bottom of door to get at the switch.I thank you for your time.Please the more details the better.Thanks again

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  #2  
Old 03-08-2013, 08:15 PM
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Join Date: Jan 2012
Posts: 7,534
There are some door panel removal instructions floating around the net under the heading " door speaker replacement ". Be aware that 96 and up use different panels.

But, before you go that route,you might be able to see the switch from the outside. Run the window down and shine a light down the slot slightly rearward of center. If you can't see it, run the window up a bit.

The limit sw on my 91 300SL is a small microswitch that uses a small pin. ( From what I recall, the sw is about 3/4" long and 5/16" wide with a 3/32" dia pin.) The bracket on mine has come off and was no longer holding the sw. My door panel was nearly falling off the door when I got the car so I can't offer door panel help.

If you can get a hold of a wiring diagram, probe the window / top controler wiring with the window up and down.
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  #3  
Old 03-09-2013, 12:27 PM
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Join Date: Mar 2003
Location: Milwaukee Wisconsin
Posts: 1,150
1991 SL door panel removal.

To remove door panel 1991 300SL.


1. Carefully remove the door lock knob by pulling outward ( parallel ) to release.
2. Using extreme care, remove the wood trim behind the door release handle by lifting outward with a panel removal tool.
3. Extract the single screw securing the metal trim behind the door release handle.
4. Remove the single 10mm bolt securing the door latch assembly to the door.
5. Carefully remove the seat control assembly and wood trim on the door panel using a panel removal tool and prying outward on the outside edge.
6. Remove 1 screw from inside the door pocket on the outside edge of the door in the pocket hinge assembly.
7. Remove the single very small screw from inside the pocket on the inside edge of the pocket securing a piece of plastic molding. Remove the molding and extract 1 large screw securing the door pull handle and panel to the door.
8. Extract 1 screw securing the black trim piece around the door latch. Lift up from the bottom to remove.
9. Extract 3 small screws securing the chrome trim on the top of the outside edge of the door panel and remove trim.
10. Remove the courtesy lamp assembly at the bottom of the door panel by snapping it out with a panel removal tool.
11. Using a panel removal tool, carefully release the “pop” fasteners from around the perimeter of the door panel. Lift up on the door panel to release the metal clips from the top edge of the door panel.
12. Slide off the vacuum hoses from the connectors near the panel bottom.
13. You are now holding the free door panel.

Reverse steps for installation.
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  #4  
Old 03-09-2013, 05:49 PM
po7553
 
Join Date: Mar 2010
Location: Las Vegas Nv
Posts: 28
window limit switch

Thanks for that info I have taken the interior panel off many times I need detailed directions on how to take the exterior door trim (panel) off the lower part of the door.I just dont want to break any thing I cant see.Thanks again
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  #5  
Old 03-09-2013, 06:29 PM
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Join Date: Jan 2012
Posts: 7,534
Taking the lower exterior trim off won't get you to the window limit sw or any internal door parts, the inner panel needs to come off.
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  #6  
Old 03-10-2013, 11:50 PM
po7553
 
Join Date: Mar 2010
Location: Las Vegas Nv
Posts: 28
on the older sl' s there is a hole on the exterior behind the panel where you can access the switch I just dont know how to take the panel off.If anyone knows please let me know a diagram would be nice.Thanks

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