amoffitt

I replaced mine yesterday with an Aluminum one. Seems to be back to working condition. Two things that I wanted to ask:

1. This Aluminum replacement seems to cause more resistance as I believe it should or is this just in my head?
2. I scratched the ring that comes off when you remove the knob off of the controller. Does anyone know if that's a piece that is replaceable by itself?

amoffitt

This is the piece I am referring to. In the blue circle.

shotgun_banjo

Same here,

If you can send me the file so that I can print it. Currently trying to gorilla glue the shaft right now and still debating if I need to buy the alum. version of the shaft.

shotgun_banjo

You can't buy that piece. If I where you I will sand it down and spray it will a silver paint.

Big Daddy

Your lucky
Normally they fail a week after the warranty runs out

xEryx

I was scrolling through music really fast and it broke and would not scroll anymore. Luckily I still had like 1000miles of warranty so they are replacing it.

Shmatko22

The plastic internal shaft has a breaking point. Not sure if this was designed as preventive measure to save the entire unit from breaking or just sneaky planned obsolescence.

There is a seller in USA who also offers an upgraded aluminium shaft.
Attached is a helpful PDF file on how to do the replacement.

They have it on Amazon Prime too IE Works Replacement Shaft

tbw23

Thought I’d go ahead and add mine to the list, as it failed a couple weeks ago. My 08 c300 lasted almost 10 years, unless the previous owner changed it out already.

delirium

shotgun_banjo

You don't need to remove the console. Just push the chair back and reach between the console and carpet and use your fingers to push the wires towards the passenger seat. The have a lot of patience in wiggling the entire wire out from the small hook below the console. It will come out eventually. Then when you are putting it back just run the ribbon on the biggest rectangular opening below the console.

delirium

do you mind posting a picture of what you mean? It sounds like I need to stick my fingers under the center console and push the wires out through the passenger side. Then i can disconnect the ribbon from there?

IGB

Not being the least but sarcastic, but you must have really tiny fingers...

Unless.... do you use something like a screwdriver shaft to lift the edge of the console away from the carpet?

Shamusodoofus

I had the same problem as you, the ribbon seemed to be really wedged in and near impossible to get out. What I did instead was slowly wiggle the wires loose so I could pull the COMAND knob assembly out a bit and I disassembled it, and replaced the shaft inside the car with the ribbon still connected. You'll have to be careful if you do this because there are lots of small parts, but it certainly beats having to wrangle the entire assembly out of the car in my opinion.

shotgun_banjo

I just scraped my two fingers and a lot of swearing! Best is to wear surgical gloves so that you won't scrape the fingers and finger the hell out of the cable LOL! What I did is push the carpet inward rather than pulling the plastic console towards the driver seat. The carpet has a tough linear at the back but it will give and don't worry about ripping it as it won't just don't insert anything other than your two fingers.

shotgun_banjo

Just be patient. again you need to push sideways towards the right passenger seat and it will just slide. when you manage o get it out do not put it back. Just tape it on the side so that it won't move and rattle with the shifter assembly

huotalicusC200K

NO NEED TO CUT THE FACTORY WIRE ..THATS A NO NO IN MY BOOK
JUST FOLLOW THE WIRE AND UNHOOK IT FROM THE SIDE PASSENGER CARPET AS SHOWN IN THIS CLIP


YOU DO NOT HAVE TO REMOVE THE GEARBOX... JUST FOLLOW THE CABLE..IT WOULDN'T MAKE SENSE TO REMOVE THE ENTIRE GEAR BOX JUST TO GET TOT THE CABLE

huotalicusC200K

YOU CAN BUY THESE SHAFTS EVERYWHERE NOW ON EBAY AMAZON AND ALIEXPRESS

DO NOT TRY TO GLUE THE OLD HAFT IT WILL JUST BREAK AGAIN

Siemens2015

i replaced my broken shaft and my scrolling function is working now but I cannot toggle to the left, right or up and down. Any help would be appreciated. I put it back together no problem. Maybe a pinched wire?

Aussierob

If your ignition key gets stuck and won't come out try pushing the gear lever forward towards the stereo and IT SHOULD RELEASE. It has something to do with the cable that tells the ignition the car is in park. Quoted $500 to fix so I just push it forward when i stop. I hope that helps. Rob

DrivingForce

Lol I just picked up a C300. My command knob also doesn't work with the scrolling it seems. But I can go up down left right. I guess if nobody told me it was supposed to scroll I'd never have known. Now I'm at a conundrum of whether or not I actually want to fix it???

Aussierob

Hi All
This might save someone a lot of time???
Just in case some of you have had the problem I have for over a month now. I have searched and googled, been to an auto electrician. Mercedes quoted $2000 to repair.
I checked all of the fuse information and everyone is all about numbers 26,28, 84 but NO ONE mentioned fuse number 11. I checked every fuse in the car and number 11 was the last one and yes it was the culprit
I had radio, cd everything worked except the Command knob. I have the upgraded screen in my car from DMP car design in Malaysia and I will say Daniel is a very patient man and did everything he could but it was nothing to do with his system.
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C300CA

After five days shy of ten year anniversary, my Camand knob scrolling stopped working. Time to replace the shaft with a metal one.

amoffitt

My metal one is still going strong. No issues. Almost 4 years later.

C300CA

Finally I took the time watching YouTube repair videos and replacing the broken shaft with the metal one. I checked every functions and made sure it is like the day I bought the car.
I watched several videos trying to find the most detailed step by step. Looks easy but when I started I found some step is not so straightforward.

I'd call the plastic shaft a design error; the cross-section at break point shows there is very little plastic area.

demartin0

I know i am a little late to the party but i had the control shaft break and scrolling did not work. now i fixed that but left, right, up, down and push knob does not work. Did you ever find a fix for yours?