PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (
-   Tech Help (
-   -   240D kickdown switch and throttle adjustment (

240Joe 07-11-2001 08:13 AM

Against the advice of someone here to have the professionals to it (the problem is there are no professionals around here) I've been trying to figure out why my 240D throttle pedal never contacts the kickdown switch.

I've taken the entire linkage system out twice, and have tried adjusting various rod lengths. Nothing seems to work. I understand that you have to be careful or you can get the linkage to bind/stick. There just seems to be no way to make it work with the adjustment that is available.

Any help is appreciated.


LarryBible 07-12-2001 07:53 AM

It could be that the cam which actuates the vacuum switches is worn. It also could be a bad vacuum switch.

Good luck,

jsmith 09-10-2001 08:44 PM

Did you ever figure this one out? I have a similar situation in my 93 300e-2.8. I can't get the gas pedal to activate the kickdown switch and can't figure out where there are adjustments. I finally wedged a piece of cardboard under there to make it engage but it still doesn't do anything. I'm going to check the switch out electrically first to see if it's busted before I spring for a new one, but I still can't figure out how to make the pedal reach back there.

David C Klasse 09-10-2001 10:53 PM

That is interesting...
So the switch might be active, but the petal just physically won't reach the kickdown switch? Must be something with the throttle linkage...

(JSmith, have you tried lubing it??)

Stan Pittman 09-10-2001 11:17 PM

The kick down switch is behind the accelerator pedal. There is no adjustment you just mash the pedal to engage it. Check to make sure the floor mat isn't it the way.

jsmith 09-11-2001 07:08 AM

floormat's not in the way

believe me i've been under there studying the mechanics of it. the pedal mechanism has plastic and has a lot of give but that's not it. it just won't make the switch go *CLICK-CLICK* (you know what i mean). if anything it sort of makes it halfway when i mash it to the floor with all my weight - by hand it's just no go. i haven't checked the throttle linkage yet because i don't know what adjustments there are. i'm waiting for my cd manual to come in to be on the safe side. FWIW i was able to make it reach by taping a shim underneath the pedal temporarily. that made it activate the switch but didn't do anything - so it could be that the switch is busted but it could also be that the throttle has to be wide open(?) and it's not, i don't have enough to go on. right now it's in the body shop getting a couple of little dents taken cared of so i have time to ponder this...

DigitalDave 09-15-2006 12:53 PM

Same exact problem...
We just purchased a 95 300D -- we have a very steep hill that leads to our house. We've always put all our cars in 1/L just prior to hitting the steep section.

In the 300D, pedal all the way to the kick down. Reach behind the throttle pedal (car off, in park, keys out...) and I can depress the switch and it clicks. It seems to be exaclty as described above...any "normal" use whereby the pedal is pushed to the floor simply does not activate the switch. I ordered the CD's on the way.

There has to be an adjustment for this...

Alan4494 02-12-2007 07:00 PM

83 300 turbo
I have the same problem. I depress the petal all the way down and it's about 1/4" clearence to the kickdown switch. Is it possible that there is something missing on the shaft (some sort of pad)

C32AMG 02-12-2007 10:01 PM

Itís been a while, If I remember.

Fellow the gas pedal rod up and under the dash to a return lever with a spring, loosen the bolt on that lever and then turn the pedal to adjust, after you unbolt it from the floor. On other early models the kick down switch is adjustable, loosen the lock nut on the engine fire wall and turn the switch.

Alan4494 02-13-2007 10:12 AM

Cap Missing?
I've been lookind at my kickdown sw and I think there is some sort of cap that is missing so that the petal shaft won't hit the switch (I've been looking at a picture of one online) I'm going to glue something onto the switch to take up the clearence unless someone has a better idea

All times are GMT -4. The time now is 03:08 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website