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  #1  
Old 12-02-2007, 09:22 PM
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W126 wiper arm question

I have a 1982 300SD and the driver's side wiper arm hits the A pillar. I assume this is not supposed to happen? My guess it that someone removed them at one point and reinstalled them incorrectly?

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  #2  
Old 12-03-2007, 12:01 AM
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anybody....Beuller.....Beuller....?
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  #3  
Old 12-03-2007, 12:14 AM
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Sounds like you have it figured out. Where does it come to rest? Is there a couple of degrees of rotation left to lower it? If so, take the wiper arm off and reinstall it shifted slightly in the direction needed to stop the wiper before it hits the A pillar. Jim
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  #4  
Old 12-03-2007, 12:58 AM
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Or it could be as simple as the wrong size blade.
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  #5  
Old 12-03-2007, 01:05 AM
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It rotates (as viewed by the driver) about and inch over the pillar (probably 2 degrees). I didn't know if this was common or not.

I doubt it's the wrong blade because I bought the blade/holder from Fastlane.
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  #6  
Old 12-03-2007, 01:10 AM
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With the chance of the wrong blade eliminated, then it leads to the orientation of the wiper arm placed wrongly on the wiper motor hub.
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  #7  
Old 12-03-2007, 01:11 AM
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The arm and blade should sit low on the passenger side. Make sure the lower blade is down all the way and then adjust the upper arm. Raise the hood to the vertical position to get better access.
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  #8  
Old 12-03-2007, 01:18 AM
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Quote:
Originally Posted by dmtinker View Post
It rotates (as viewed by the driver) about and inch over the pillar (probably 2 degrees). I didn't know if this was common or not.

I doubt it's the wrong blade because I bought the blade/holder from Fastlane.
Did the old blade hit the pillar?
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  #9  
Old 12-03-2007, 04:46 AM
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Quote:
Originally Posted by guage View Post
Did the old blade hit the pillar?
Actually I don't know, I had to replace the blades as part of the vehicle inspection when I got the car. In Maryland, they do that at first registration. The inspection here is "draconian" to say the least.
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  #10  
Old 12-03-2007, 04:56 AM
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Mine hits the pillar too, not as much tho. A shorter blade should help things out. Mine also sits where it should when at rest.
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Last edited by toomany MBZ; 12-03-2007 at 04:57 AM. Reason: more info
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  #11  
Old 12-03-2007, 07:37 AM
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My 84 500SEL had this problem and it was caused by play in the linkage. I replaced the entire wiper assembly with a used one from an 89 420SEL and the problem was gone. I don't know if the individual parts are available as I didn't even try that aproach. The other thing I have done is I removed the right side arm and wiper completely. I only makes a difference of about 3 inches on the far right side but the replacement cost for wiper blade replacement has been cut in half.
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  #12  
Old 12-03-2007, 09:28 AM
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wrong blade

Go to the dealer and get the right blade. I bought a replacement "set" off this forum / fast lane and the blade hit the pillar. Went to the dealer, got the OEM blade, no contact.
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  #13  
Old 12-03-2007, 10:16 AM
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On some Mercedes the left & right blades are different lengths
not sure if a 300SD falls into that category.
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  #14  
Old 12-03-2007, 11:28 AM
noodles168
 
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eccentric nut wiper throw adjustment

If I remember correctly there was an eccentric nut that adjusted the wiper arm throw in about the center of the wiper arm assembly on my 81 300sd. Remove the grilled vent cover to get at the area. Hope this helps.
Noodles
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  #15  
Old 12-11-2007, 12:02 AM
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Quote:
Originally Posted by guage View Post
On some Mercedes the left & right blades are different lengths
not sure if a 300SD falls into that category.
I got mine from Fastlane and they only list one blade, however I noticed the insert from the passenger's side won't work on the driver's side. The easiest solution would be get an insert that is 2 inches shorter. It wouldn't make a noticeable difference for the driver but would solve my problem. I don't know if the linkage posts are the same though. I didn't have a lot of play in my linkage so I don't think that is an issue.

I did note that the Fastlane one calls for a 22 inch (560mm) arm. I wonder if that is correct?

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