COMAND Scrolling Issue Repair (Shaft Only) Replacement Shaft Fixes Console Controller Knob Radio GPS Navigation Multi-Switch Push-Button Assembly (2008-2017)

This was much easier than it looked. I would guess 1 hr total. I recommend watching a video on removing the trim - look up "Mercedes W212 E Class 2011 Remove Replace Repair Scrolling Knob Wheel Command Console Control" on you tube. Some additional hints: The wire connector to the command module is connected to the car by a release that is under the connector (remove the car side wire first) in the center. Slide it toward the driver side and gently push the connector toward the dash. Also, when removing the ring from the knob, there are small indents at even intervals around the knob. Use those to engage the blade of your screw driver to avoid slipping - those are also the locations that make it easiest to remove. I have the Soucolor precision set $15 on Amazon which helped a lot and also a set of hook and picks ($6 to $15) on Amazon that made getting the levers off a breeze. Consider this: if you break it you only added 10% to your cost, if you repair it, you saved $250 (or almost a grand if you take it to a dealer).

Let's be honest - this is what Mercedes should have used in the first place. Yes it might have cost them a $ extra but by saving the money they put far too many owners through the misery of an early failure and a huge repair bill. This all aluminum shaft is not easy to install, but it is really not that hard either. You are provided with excellent PDF instructions and pictures as well as a really good video. It can be difficult to remove the Command unit from the car (mine was) but it is pretty easy to just make the change the shaft without removing the unit from the car and simply replacing the shaft right in the car. It is a pretty easy swap and the instructions are really great. Hardest part was removing the silver cover from the actual knob. Reinstalling the unit went quickly and all systems now work the way they should. I am super satisfied and now wondering what my local Mercedes dealer would have charged. It is great to see a small company take the initiative to make such a product.

Works great. I used it on my 2012 Mercedes GLK350 (x204). there are bunch of videos on youtube on how to remove and disassemble the knob. the closest one to the right way of removing is Scott Elliott's videos, you can search for "Mercedes W204 W212 C E Class Repair Scolling Knob COMAND Console Control Wheel Command". There is another one from X8R limited, however do not use that process, you risk damaging the unit because they are not removing all screws and forcing the locking mechanism, hence the plastic shavings they find in the unit.When removing the wiring be careful, you will need to pull the carpet on the side of the console to release the wiring. Check the video from TM-Parts "Mercedes W204 C-Klasse Comand Controller Knob ausbauen TM-Parts" it is in German but informative enough.The next hard part is to remove the knob covers, be patient and use plastic prying tools.The key to disassembly of the unit is, to remove the 8 screws from the back of the unit and remove the 4 plastic towers to disassemble the electronic board and the shaft. Scott removes the moving parts (flaps). you don't have to. you can use a small screwdriver to release the locking mechanism from the side of each plastic tower. I left the springs as they are and did not remove them. I also used lithium grease on the shaft and the gears. Works perfect.This is truly a do it yourself level repair and there is no need to spend too much at a dealer for a sub-par solution.

Works

Superior aluminum construction, compared to OEM plastic part. Fixed the command controller in my wife’s Mercedes. Works like it’s supposed to now. The dealer does not sell just the shaft, you have to buy the whole command controller; $320 in my neck of the woods. You will likely have to perform this repair inside the car as disconnecting the part from its wiring harness is too difficult ( you would have to remove the center console to get to it). Take care not to drop or lose any of the little parts and screws while performing the repair.

Went in pretty easily.The video front Scott Elliott as others mentioned is very good but you do not need to cut the wires as he says in the video. Loosen the connector as he shows near the shifter and then pull the wires at the scroll knob assembly about 5” toward the knob. This will give you enough slack to get the assembly out of the console. Hold it over your lap and open it up and install the new shaft and close it back up. Then pull the wires back to to connector and plug the wiring harness back in.Not cutting the wires makes this much simpler and it is a screwdriver type of job.Another difference - you do not need to pull the 4 rocker switches apart - get a really small screwdriver in there and they release easily. However this is pretty minor difference.Thank you Scott for posting the videos!

Serveal great you tube videos to make the process easier. I installed this on my 2010 C300. A few helpful hints. When removing the control unit, the wire runs under part of the console into a clip. I was able to use a plastic flat pry tool to slide under the console and loosen the clip until the wire was free. I also recommend some pick tools to assist with disassembly of the actual unit. This helped to remove the plunger assemblies. I did not have to remove the console. Just the shifter, trim and cup holder trim piece. Overall, not a bad job and for me, it work just like OEM. New, this part is 300 dollars and will still have the plastic piece. Save the money and do it. It's so nice having the dial work again.

This idea of switching out a plastic core for a stainless steel one is ingenious for many reasons, except that it degrades the responsiveness of turning the knob. It sometimes takes two or three clicks for it to start responding or move to the next song. So three stars for there being an easy and cheaper fix than taking it in to a dealership. Two stars less for it not being the best alternative to getting a new/used Comand Knob. I did have to find a quick YouTube video to help with the uninstall so I didn’t damage anything but it wasn’t difficult by any means.