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  #1  
Old 07-09-2009, 04:36 PM
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Instructions on changing accelerator pedal on a W126?

Instructions on changing accelerator pedal on a W126? Thanks!

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  #2  
Old 07-09-2009, 07:49 PM
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Still cant get it off. Tried to remove myself, couldnt do it. Then I printed out directions I found on the internet and it wont come off. I need to drive this car early in the AM. I cant even get the pedal to pull up off of the rod, so I wonder if my pedal is even broken? I wonder now if perhaps the linkage is bent? I dont see how though, I never had it over 1/2 way down. It is now probably the way I have been jerking on it. Smashed my finger with the pliers, cut my knee where it was on the ground, etc.

Any detailed help on how to remove would be appreciated.
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Old 07-09-2009, 08:08 PM
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I have searched and searched the net and cant find anything except pedals advertised and how EASY they are to change... yeah right... maybe when new, but not when they have been on there for 21 years.

My blood pressure wont handle it this evening. I get too stressed out. I will take my chances and drive it to a shop tomorrow I guess and pay someone to do it. I cant never do anything myself anyway.

Last edited by 86560SEL; 07-10-2009 at 12:39 AM.
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Old 07-10-2009, 02:31 PM
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Drove the car anyway today with the throttle only going 1/4 way down. Thats fun on a 300SEL.

Guess failure of the pedal is really not as common as some say, since I cant find any info on it anywhere.
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  #5  
Old 07-10-2009, 02:40 PM
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What exactly is the problem with the existing pedal? Is it broken or what?
The bottom portion comes off after removing the carpet pad and pulling a little plastic tab straight out towards the rear. I don't have my car here right now, so I can't advise on the upper connection to the accelerator linkage rod, but I assume it is a ball/socket like the throttle linkage under the hood.

Is the linkage under the hood maybe binding? This is a very complex Rube Goldberg design, and bushings can wear and cause issues. If the linkage is just sticking or binding, try unsnapping the ball on the firewall and see which portion is binding.

DG
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Old 07-10-2009, 03:10 PM
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Take both of the floor mats out of the drivers footwell (Frankly I find this as being the hardest part of the operation)

There is a gray clip on the bottom of the pedal holding it to a metal bracket on the floor. You might need a pair of needle nose pliers to squeeze the clip

If what I think it broken then the pedal should lift right off the bracket. Look at the metal linkage bar, you should see a piece of plastic on the end. Twist it off.

Look at the new pedal that you bought (If) On the back you'll see the plastic piece thats broken. Its a tear drop shape so the pedal only goes on one way. Simply push it on and twist it to secure.

Put bottom back on over the bracket, reattach clip and put the floor mats back in.
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Old 07-10-2009, 05:42 PM
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Thanks. True, I could not even get the floormat out last night. It was like it was stuck around the accelerator and would not budge. I made sure it was free from around the kick-down button, but it still would not come out.

I tried squeezing that horizontal clip looking thing on the bottom of the pedal last night when I tried, but it would not budge. It would squeeze, but I still could not get it to move.

Can you tell from these photos if it looks like the pedal itself is broken? I will try again when I get a chance....

Yeah, my floor is soiled.

Oh, I had already pulled the rubber overlay off of it last night. The new pedal is all one piece.



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Old 07-10-2009, 05:52 PM
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Yeah looks like the plastic (Or is it rubber?) piece broke. Happens to me once every few years. The trick with the mat is to pull the foot area forward first and then slide the entire mat to the left. like I said its harder to get the damn mat out then to put the pedal back into place.
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  #9  
Old 07-10-2009, 05:52 PM
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Picture

Quote:
Originally Posted by Fulcrum525 View Post
Take both of the floor mats out of the drivers footwell (Frankly I find this as being the hardest part of the operation)

There is a gray clip on the bottom of the pedal holding it to a metal bracket on the floor. You might need a pair of needle nose pliers to squeeze the clip

If what I think it broken then the pedal should lift right off the bracket. Look at the metal linkage bar, you should see a piece of plastic on the end. Twist it off.

Look at the new pedal that you bought (If) On the back you'll see the plastic piece thats broken. Its a tear drop shape so the pedal only goes on one way. Simply push it on and twist it to secure.

Put bottom back on over the bracket, reattach clip and put the floor mats back in.
to go with the text.
Attached Thumbnails
Instructions on changing accelerator pedal on a W126?-w126-accel-pedal.jpg  
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  #10  
Old 07-12-2009, 11:20 AM
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Quote:
Originally Posted by S-Class Guru View Post
What exactly is the problem with the existing pedal? Is it broken or what?
The bottom portion comes off after removing the carpet pad and pulling a little plastic tab straight out towards the rear. I don't have my car here right now, so I can't advise on the upper connection to the accelerator linkage rod, but I assume it is a ball/socket like the throttle linkage under the hood.

Is the linkage under the hood maybe binding? This is a very complex Rube Goldberg design, and bushings can wear and cause issues. If the linkage is just sticking or binding, try unsnapping the ball on the firewall and see which portion is binding.

DG

Unless there has been a hack in there before you, the accelerator pedal needs be removed before the carpet.

Original carpets have a hole for the accelerator pedal lower bracket, not a notch. A notch is what you get after after you rip out the hole by removing the carpet before removing the pedal.

Jim
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Old 07-14-2009, 08:12 PM
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k... thanks.... here I go....trying again.
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Old 07-14-2009, 08:50 PM
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I GOT IT!! It WAS easy as pie.

What the problem was when I was working on it the other day, I was not able to get that clip out for some reason, but tonight, I was able to pull the clip straight out very easily. Your right, the mat was a pain, but Fulcrums directions to remove the floor carpeting made it alot easier. I was not able to remove it the other evening when I was trying to do it MY way.

Also, I had hard time twisting the old pedal off of the rod, but I finally got it. It was popping and cracking.

The new pedal went on as easy as silk. Oh, btw, I can see NO difference in my old pedal and the new... the design that is. I thought someone said they were different now. ?? I will post a photo of the old pedal later.

Funny thing though is that the old pedal dont look broke, which had me concerned, but that plastic tab is floppier, which may have been the issue, because with the new pedal now in place, it seems to be fine so far. I guess time will tell tomorrow when I drive it.

OIL change tomorrow evening.

I am still learning at this Mercedes stuff... I have had three of them over the past 6 years, but I really have never had any issues that needed attention. Lucky I guess. Now I can focus on my odometer (broken) issue... I think I will leave that to the MB shop though.

Thanks again!
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Old 07-15-2009, 02:20 PM
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Well, I spoke to soon, or it was too good to be true.

The first miles I drove it today, all seemed fine, but the pedal was harder to push than the old pedal and it didnt seem to be springing back up all the way, which I discounted as it being a new pedal. When I got into town, at idle, when I would let off of the brake without depressing the pedal, it would want to "go" more than normal.... with that said, I took my foot and tried to pull up the pedal, but I messed something up, because then I liked to have never got the car to accelerate. My trip back was a SLOW GO and I prayed at every traffic light I came to that it would stay green.

I looked at it when I got home and it dont "look" right. I dont have time to check it again until this evening, but I am wondering if either I didnt install the pedal correctly, or if something else was the issue all along? Perhaps something under the hood is damaged? I will check the pedal again later and report back.
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Old 07-15-2009, 09:20 PM
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Another update - I worked on the pedal a few minutes ago... after about blowing a gasket and having a stroke, fighting mosquitos, etc.

It appears that I didnt have the rod in the hole of the pedal and it was only the edge of the tab. I liked to have NEVER got the hole in that tab onto the rod linkage. After finally getting so agitated, I pressed on it with all of my might and it finally went on.

I THINK I finally got it on there and correctly. Here are some photos... any input as if this is correct appreciated...











ruined my shoes....



by having to lay the tops of my shoes in this crap, with my knees on the ground as I reached for the pedal.... the concrete part of the driveway would have probably been worse. Wah, wah, wah.



I park the car here, rather than on the concrete because this is the easiest place I can park the car... its wet because I had washed some car parts from my other old car I am restoring.


Quote:
Originally Posted by 86560SEL View Post
Well, I spoke to soon, or it was too good to be true.

The first miles I drove it today, all seemed fine, but the pedal was harder to push than the old pedal and it didnt seem to be springing back up all the way, which I discounted as it being a new pedal. When I got into town, at idle, when I would let off of the brake without depressing the pedal, it would want to "go" more than normal.... with that said, I took my foot and tried to pull up the pedal, but I messed something up, because then I liked to have never got the car to accelerate. My trip back was a SLOW GO and I prayed at every traffic light I came to that it would stay green.

I looked at it when I got home and it dont "look" right. I dont have time to check it again until this evening, but I am wondering if either I didnt install the pedal correctly, or if something else was the issue all along? Perhaps something under the hood is damaged? I will check the pedal again later and report back.

Last edited by 86560SEL; 07-16-2009 at 01:27 AM.
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  #15  
Old 12-09-2013, 07:59 PM
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My NEW pedal just broke!!

The hinge where the pedal attaches to the rod, failed tonight. It was only about a year in service! I'm not sure if new pedals are up to the quality of the originals.

Actually I have two W126's, both with new pedals…..Maybe I can swap them tonight (if I don't break them both). I have a lot of driving to do on the car with the broken one tomorrow.

I came here to remind myself how to remove the accelerator pedal. Thanks for the thread.

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