Hello,
After reading many posts and having the same high idle situation as most I am going to attempt the DIY fixes first. That is check for loose wires on the idle control module and then re-solder the connections as suggested by some. My question, is there any secret to removing the glove box in my 380 SL to get to it. The books and cd's I have tell where the module is but give no instructions to remove the glove box. Seems pretty basic I know, but I would hate to take it in parts to my mechanic ( again.)
Best Wishes,
John

Some small screws and out it comes as I recall.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

As Check indicated - not much to it. The following discusses an A/C issue on 126 cars. There's some info in this post that discusses glove box removal.

http://business.baylor.edu/Richard_Easley//autofaqs/recirc.htm

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

Thanks Chuck and Mike. I will proceed tomorrow and report any success.

__________________
John
'02 Isuzu Axiom Canal Blue Mica "Wonder Car"
'02 Isuzu Axiom Garden Green Mica from Alaska "Sara"
'97 Ford Taurus Wagon 225,000 miles Intense Black "Batmobile"
'91 560 SEC Ice Blue Metallic "Big Benz"
'84 380 SL Astral Silver "Pretty Girl"
MBCA member
Chance favors the prepared mind.

The glove box came out neatly with these instructions. The board looked fresh ( no burn, discoloration etc. ) on inspection but is probably the original. I have an appointment with the shop tomorrow. Thanks again.

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John
'02 Isuzu Axiom Canal Blue Mica "Wonder Car"
'02 Isuzu Axiom Garden Green Mica from Alaska "Sara"
'97 Ford Taurus Wagon 225,000 miles Intense Black "Batmobile"
'91 560 SEC Ice Blue Metallic "Big Benz"
'84 380 SL Astral Silver "Pretty Girl"
MBCA member
Chance favors the prepared mind.

have you tested the voltage at the idle contol valve with it plugged up? Pull the plug out a little and you can put your leads on it. if voltage is there your control valve is bad. I did take mine off and cleaned it with Carb. Cleaner then WD 40 and it came to life.

Thanks for all of the input. As it turned out it was the original idle control box dated 4/84 that failed. Two resistors were smoked and 4 capacitors looked pretty swollen. Having an electrical background I thought I might replace the components myself and took the board to the major electronic parts supplier here for component identification. The older gentleman who himself was around well before the transistor was invented looked at the board for the longest time under magnification and then with the biggest smile said " that is the most beautiful circuit board I have ever seen." We both agreed on that and that we could not identify the 6 components in question and if we could I would only end up chasing more problems, it just wore out. That board is used in other more plentiful MB's and my mechanic Morrie came up with one that looked new, dated 10/94, and replaced it with all troubleshooting charges included for $250., what a nice guy and what a relief. It is magic the way this thing holds idle the way it was intended to.
At this given moment " I Love This Car."
John

__________________
John
'02 Isuzu Axiom Canal Blue Mica "Wonder Car"
'02 Isuzu Axiom Garden Green Mica from Alaska "Sara"
'97 Ford Taurus Wagon 225,000 miles Intense Black "Batmobile"
'91 560 SEC Ice Blue Metallic "Big Benz"
'84 380 SL Astral Silver "Pretty Girl"
MBCA member
Chance favors the prepared mind.

I might add that in an earlier post when I said the board looked " fresh and clean " it was the blower speed control box I had in my hand. You have to look a little deeper behind the glove box to get to it and the idle speed box is clearly marked in English, the blower control is in German.
John

__________________
John
'02 Isuzu Axiom Canal Blue Mica "Wonder Car"
'02 Isuzu Axiom Garden Green Mica from Alaska "Sara"
'97 Ford Taurus Wagon 225,000 miles Intense Black "Batmobile"
'91 560 SEC Ice Blue Metallic "Big Benz"
'84 380 SL Astral Silver "Pretty Girl"
MBCA member
Chance favors the prepared mind.