[W126 Coupe] W126 Questions

[Dick Spellman]

Hi Pete:

It does sound like your idle control module is part of the idle problem 
based on your swap.  I'd check the overvoltage protection relay as this 
can cause the failure of a new or rebuilt idle control module if it too 
has gone bad.  You may want to remove the air slider valve, clean it 
with carb spray to remove any build-up and check/replace the condition 
of the two hoses which if loose or poor fitting will allow un-regulated 
air to enter the air volume meter and intake.  Check with Ken at 
<http://www.benz-store.com> for the correct match to your original idle 
control module.  The odometer would likely be the gears (there is an 
on-line source, I 'd have to look this up) which you can get and do 
yourself if you are inclined.  The clock would likely be the two 
capacitors that fail and they are available at Radio Shack.  You might 
also check the clock time setting stem and spring to make sure they are 
not holding the clock back as well as the presence of 12vdc to the clock 
works.  The soldered lug is(-12vdc) on the back of the clock module and 
the single insulated plug to the male spade lug is(+12vdc).

As for the 72 350SL with the 450 motor I think it's a keeper unless it's 
in really tough shape.  has the euro bumpers and the V-8 too boot.  Only 
issue would be if the US gov't changed out the original gear and reduced 
the power in the process.

Just my 2.

Take care,

Dick

Pete wrote:

> I just got a 1983 500SEC AMG and have a few questions.
>  
> The first question, almost all of the literature I'm finding doesn't 
> list one in 1983. Second, the only thing I know that has AMG on it, 
> besides the trunk, is a receipt for an "AMG valve job" years ago at a 
> shop in the Dallas area. I have all recipes back to 1984. Third, it 
> idles at 1500 RPM. I checked the idle control valve and it's 
> operational, at least the piston is moving, and moves when 12 VDC is 
> across the terminals. a friend of mine loaned me an extra idle speed 
> control module from one of his 1985 500 SECs to verify if this is the 
> problem. The idle dropped to about 800 RPM but oscillates as much as 
> 200 RPM. The number on mine is 002 545 33 32. His number is 002 
> 545 _*45*_ 32, as close as I can remember without getting back under 
> the hood. Does anyone have any insight on my actual problem? Fourth, 
> the odometer and clock don't work. Do these have the same fixes as the 
> old 107's, gear slipping on the shaft and blown resistor?
>  
> I just got this car to drive while I am restoring my 1972 350SL 4.5, 
> but after only a week I'm wondering if I don't like the SEC better. It 
> has a few old car problems like blown stereo speaker, windshield 
> washer pump, seatbelt presenters, etc. but it's an extremely sound 
> car. I'm looking forward to hearing from you.
>  
> Thanks,
> Pete Williams
> 1972 350SL 4.5, 257K Miles
> 1983 500 SEC AMG, 140K Miles
> MBCA, Central Oklahoma section
>  
> A good friend will come and bail you out of jail...but,
> a true friend will be sitting next to you saying, "Damn...that was fun!"
>
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