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  #1  
Old 07-26-2007, 04:36 PM
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Throttle Microswitch on a 126?

Is there a throttle microswitch on my 87 420SEL? If so, where is it located?

Thanks
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Old 07-26-2007, 05:22 PM
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Idle contact/full load is located on the throttle butterfly.
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  #3  
Old 07-26-2007, 06:00 PM
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can you get more specific on what Im looking for? with the airfilter housing removed, I see the throttle linkage and I dont see any type of a switch connectted to the linkage. there is a pic of a microswitch that Ive attached listed in the parts section but its for a 87' 300t. Am i looking for something similair to this?
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Throttle Microswitch on a 126?-mircoswitch.jpg  
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  #4  
Old 07-26-2007, 07:17 PM
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Here is a photo.
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Throttle Microswitch on a 126?-switch.jpg  
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Old 07-27-2007, 11:01 AM
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Thanks dpetryk! I understand now. I thought that there was a microswitch AND a throttle switch that I needed to troubleshoot and I was tearing my hair out loooking for the microswitch!
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  #6  
Old 07-28-2007, 12:16 AM
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The 103 engine does have both those switches.

The 420 does not?
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  #7  
Old 08-26-2007, 04:26 PM
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Quote:
Originally Posted by dpetryk View Post
Here is a photo.
HUGE thanks for the picture from me. I'd given up looking and concluded that this '89 w126 500SE didn't have such a switch at all. Which was a damn shame because the engine behaviour suggested that if there was one, it wasn't working.

Now, thanks to you, I've found the stoopid thing - and it isn't working!

Well, it's intermittent: it operates if you let the butterfly snap shut, but letting it close gently usually doesn't close the contact.

My question now - before I go burrowing into the engine to get my hands on it - is what am I in for if this can't be resurrected? Do I have to replace the entire Throttle Body, or can I get the switch separately?

Anyone have a clue? I'd be very grateful for any info.

CD
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  #8  
Old 08-26-2007, 04:49 PM
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Quote:
Originally Posted by cdavis View Post

Do I have to replace the entire Throttle Body, or can I get the switch separately?

OK, I went hunting through the catalog, and found P# C7010-76651, which looks just the business. I'm very interested to note that the switch seems to have elongated screw holes to allow for a few degrees of adjustment, and I'll see if I can slacken the screws and wiggle the existing one first.

CD
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