metalgear84

Update, mine C250 CGI (inline 4) also broken, 4 years 3 months....

metalgear84

Hi all, update here. Mine last for 4 years and 4 months and the scroll died.

Fortunately the link below saved my wallet (someone shared at here and thank to him)
http://www.benzworld.org/forums/gene...-problems.html

My local dealer said it cost MYR2300 (Malaysia Ringgit, equivalent to USD740) without installing. I was able to repair it myself although it really don't seems that easy as compare to Video. I spend only RM11.50 (to buy the epoxy glue, equivalent to USD3.70) to repair this thing, but you sure need more patient than this.

Anyhow thank to the author who record this. I save plenty of money!

Mr_Clifton

I opted to just replace the part since it lasted 4 years. Got it from http://www.oediscountparts.com for $177.00 (part# 204-870-06-79)

Thanks for posting that video (and if the person who made the video reads this board, big thanks to you!)

I had the part out and swapped within 10 minutes And that includes being careful and cleaning as I put it back together, it seriously was quick to do.

mdof4

3 years 11 months and rotation of control knob quit. 2011 glk seems like its coman. Thanks to md world found that link on how to repair it. Basic tools, common sense, and of course patients. I plan on doing it soon. Car is great just had to put bridstones on and brakes all the way around, very easy. Went with high grade ceramic pads almost stopped brake dust.

Erinstephenson

I just replaced my command knob, and I think I took me all of 10 minutes. This video is a HUGE help. Very easy to follow. In fact, it was so easy I'm thinking about having a go at actually repairing my broken knob.

bones19396

My knob also stop scrolling after 5yrs. All other functions work. I repaired mine from a Utube video. The problem is the knob shaft inside the unit has broken if half. To fix it you must remove the unit from the console and disassemble it completely. I watched the Utube video and it was excellent.

good luck.

Williamwu_72

The rotary axis may be broken. The attached links showed how to repair it by glue. The page text is in Chinese, but the pictures shows the steps to find the broken neck, which is the weak section for torsion force.

http://club.autohome.com.cn/bbs/thre...0153753-1.html

Williamwu_72

Open the box, get out the axis, you will find the weak neck position, it is between the metal and plastic transition section, only four points contact works for torsion force flow, poor!!!!

Glue it with A+B glue, then it works! Today I repaired my GLK 350, 2012, 75,000km, successful! The turning function comes back!

JHBENZ

My comand knob has also failed to work when rotating. I called my dealer and Mercedes head quarter. Both were of know help. What's really troubling is the knob is rarely used. We predominantly use the steering wheel buttons for navigating the radio and only use the knob for GPS entries. So with minimal use, now I'm forced to buy parts for a poorly designed product and either do the shaft repair service myself or purchase a new knob that may have the same issue.

How is Mercedes able to not recognize this trend and provide owners with real solutions?

nwachy

I also had the same problem a few weeks ago in my 2010 C200. After a few hours of research, it took half a day to fix it myself and that included the time it took for the glue to set. I decided that I was not going to pay an exorbitant amount to a dealer to fix a problem which obviously is as a result of poor design. I would encourage anybody who has this problem to go ahead and try the fix as it is not so difficult.

These 2 links were very helpful:


Goodluck

gnueliafnak

Hey Guys, new here since I just bought a 2009 C300 4Matic Sport Sedan and was playing around with the features and such.

I noticed that the scroll wheel wasn't working when I rotate it and thought it was literally meant to function as is like that until I googled and stumbled upon this thread and a few others.

My question is, how easy or hard is it to fix this yourself? I tend to like to fix things myself but have never really tried with something of this magnitude. And I sure as hell am not bringing it to an MB dealer when I called and they said they would like to do a DX on it first to see whats the main issue which costs $200+.

I saw the videos on youtube and was wondering, how long do you have to wait for the epoxy to set and dry? Are there any major $$$ risks associated with attempting to fix this yourself.

illlojik

I paid $207 including tax and shipping (part itself was $180) for a new one and replaced mine altogether. The hardest part was removing the old one without damaging the wire. I ripped mine out and called it a day.
As for repairing the part itself, I'd assume once you get everything out safely, it's not so bad. Just a matter of applying the epoxy to the right areas. IT's good practice to let epoxy cure for 24 hours before use. Especially with moving parts.

gnueliafnak

Yea I figured once its out, the rest would be sorta easy, but knowing me I might break something and it would cost much more $$$ to fix.

I am thinking about just replacing the part itself altogether.

May I ask did you order Part: 204-870-06-79 from parts.com or the other site listed above?

How long did it take you to install the new replacement part? And when you said you "ripped" your wires out, did you literally do that with no damage? I'm just trying to find the fastest and safest way to fix this issue.

Also would this work on my 2009 C300 4Matic Sedan?

Sorry for so many questions, I did read through the thread, but I wanted to be sure and specific about the answers. Thanks again guys.

illlojik

Minus the fiddling with the old wire, takes about 30-40 minutes to carefully take apart the console and put everything back in. Probably faster .

gnueliafnak

Sounds great. Regarding the part no. is it the one I mentioned previously? Thanks.

Kosterkille

check these videos out..you can diy .

ghlkal

Great information here for us DIYers

Thanks to everyone who contributed

speedotite

My nav was deemed nearly useless because the knob happened to break while the map was at full zoom out 500 miles - I came across another thread here on favorite voice commands and realized "zoom in" or "zoom out" in maps exists. Maybe this is common knowledge but not for me. This is after driving around for a year basically looking at a full globe...

In sum, use voice for zoom for those of you who would rather not spend on the rotate function!

Eonetiller

Just wanted to add that my knob went out at around 4 years and 5 months.

beto778

Hello everyone, I'm a proud owner of a 2009 c350, I was in a trip to NY this weekend and I have knob failiure. I decided b4 purchasing the part 375 CAN, to put a part the one that failed. I was able to actually put everything a part an fix the original controller.

If any of you are in Toronto, please contact me so I can explain exactly what is needed to be done if you don't think you can do it I maigh be able to help you please Don't spend your money b4 trying this it actually achievable and if it worked out for me should also work out for you all right.

IGB

Thank you for your contribution. Very much appreciated!

JohnnyC300

Mine is an '09 and I have joined the command scroll wheel failure club this week.

PixelGrinch

I have a 2011 C300 and the knob was very well cared for. 4 Years and a couple month later, it failed!

This is how I feel Mercedes Benz

<--- Mercedes Benz
^
Me

Merry Christmas

ps: I hope the extended warranty I just purchased from the car dealership will cover that.

zaidyboy

Hey,

My knob stopped working today and I live in Toronto...any help would be much appreciated

JohnnyC300

Search youtube for Scott w204 command knob repair. He has a step by step video of how to fix it up - for that and many other w204 maintenance / repairs / mods!