Command Knob NOT the usual issue
Thread Starter
Newbie
Joined: Apr 2025
Posts: 3
Likes: 0
W212, h247, w246
Command Knob NOT the usual issue
My command knob module, including:
the knob
The C button
The arrow button
has stopped working. All actions are dead
is it a fuse? Anyone know which one?
Also, dones C button and arrow button illuminate in Orange? I dont remember and it would help to know if the module has no power for a broken fuse
This model
the knob
The C button
The arrow button
has stopped working. All actions are dead
is it a fuse? Anyone know which one?
Also, dones C button and arrow button illuminate in Orange? I dont remember and it would help to know if the module has no power for a broken fuse
This model
Last edited by Mikemb87; Apr 18, 2025 at 05:21 PM.
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
two birds, one stone...
This is an electronic module built with marginal connections.
Either replace or resolder loose pins if it was not liquid soaked
rotary dial + tranny E/S selector module
Nearby tranny button is the same way: solderless module.
Either replace or resolder loose pins if it was not liquid soaked
rotary dial + tranny E/S selector module
Nearby tranny button is the same way: solderless module.
Last edited by CaliBenzDriver; Apr 18, 2025 at 08:52 PM.
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
I am sure it gets powered somehow from a fused circuit.
This is a 250mA low power circuit.
There's 0.1% chance you're dealing with a "fuse" issue...
Choices are replace module or repair poor connections. Cost less than $1,500.
This is a 250mA low power circuit.
There's 0.1% chance you're dealing with a "fuse" issue...
Choices are replace module or repair poor connections. Cost less than $1,500.
Last edited by CaliBenzDriver; Apr 22, 2025 at 03:24 PM.
Thread Starter
Newbie
Joined: Apr 2025
Posts: 3
Likes: 0
W212, h247, w246
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
disabling gremlins
-- These LIN modules are built with poor connections that oxidize.
-- Sometimes drinks get spilled...
You can SIMPLY DO A FAULT-RESET that will last sometime until poor networking condition is flagged again.
I have pics of the inside of these units... I got the whole chassis surveyed for gremlins nest
solderless connections
OPTICAL SENSOR + loose pins
The optical sensor is sensitive to dusty contamination.
Same thing inside EIS Module as well.
Repair is either replace $$$$ or a 5mn quick 4x solder job... As mentioned: free reset also effective.
-- Sometimes drinks get spilled...
You can SIMPLY DO A FAULT-RESET that will last sometime until poor networking condition is flagged again.
I have pics of the inside of these units... I got the whole chassis surveyed for gremlins nest
solderless connections
OPTICAL SENSOR + loose pins
The optical sensor is sensitive to dusty contamination.
Same thing inside EIS Module as well.
Repair is either replace $$$$ or a 5mn quick 4x solder job... As mentioned: free reset also effective.
Last edited by CaliBenzDriver; Apr 22, 2025 at 03:43 PM.
Member
Joined: Sep 2016
Posts: 104
Likes: 21
From: Portland, Oregon USA
2010 ML350 Bluetec, Alfa Romeo GTV6
Does anybody know if the command knob / switch needs to be coded if it's replaced?
I picked up a used one from a wrecking yard and was wondering if I can do the shaft swap on it, then just swap with the one in the car.
Thanks,
Ian
I picked up a used one from a wrecking yard and was wondering if I can do the shaft swap on it, then just swap with the one in the car.
Thanks,
Ian
Trending Topics
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
LIKELY POSSIBLE
Unplugging modules will record faults
Clear the stored codes afterwards
Do use a scanner even though it could work without one... pays for itself!! 🤞
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