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Old 07-05-2000, 08:31 AM
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I drove my friend's '85 280 SL to the beach last weekend, and I noticed that there is about an inch of free play in the gas pedal before it actuates the linkage. I looked at the linkage under the hood, and the gas pedal is connected by linkage to a bell crank-type mechanism (bell crank has a slot in it in which a roller rides. Roller is attached to an arm which moves the throttle plate). There is a micro switch (presumably for the k-jet fuel injection) which rides on the bell crank to which the gas pedal linkage is connected, and it is activated during the "play" stage of gas pedal movement, before the throttle plate is even moved. This doesn't seem right to me. There are several linkage rods that have slotted adjusters in them which lengthen or shorten them, and it looks like the play could be adjusted out, but I'm not sure what the correct free play is (if any) and when the micro switch is supposed to be activated. Does anyone know the correct adjustment procedure? Thanks in advance for any help!
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Old 07-05-2000, 10:03 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
If the car is a automatic then it sounds as if the linkage is correct!! All of this is to allow extra tension on kickdown cable. The switch you are describing is for decell-shutoff, emission control. There is a white plastic grommet that wears out & creates even more play than designed. Main thing is that at full throttle the throttle plate is completely open!!

27 YEARS DEALER M.B. Shopforeman
1986 190E 16V
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Old 07-06-2000, 08:13 AM
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Thanks Doc, I will check to make sure the throttle plate is opening fully and adjust accordingly if it is not. The white plastic post appears to be unworn.
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