W221 Comand malfunction
Thread Starter
Newbie
Joined: Jan 2019
Posts: 3
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W220 W221
W221 Comand malfunction
Hello all,
I have a 2007 S500 and have been having trouble sorting out audio issues for the past two years. Everyt ime I turn the car on, comand will boot up the way it should, however after anywhwere between 10 seconds - 1 minute, the screen blacks out and reboots. It constantly does this and got so annoying that I disconnected the comand unit and use a portable speaker in the car. Really sucks that I can longer enjoy the music from the Harman/Kardon system it came equipped with.
If anyone has experienced this issue and has been ale to fix it, I would immensely appreciate your help.
Thanks!
I have a 2007 S500 and have been having trouble sorting out audio issues for the past two years. Everyt ime I turn the car on, comand will boot up the way it should, however after anywhwere between 10 seconds - 1 minute, the screen blacks out and reboots. It constantly does this and got so annoying that I disconnected the comand unit and use a portable speaker in the car. Really sucks that I can longer enjoy the music from the Harman/Kardon system it came equipped with.
If anyone has experienced this issue and has been ale to fix it, I would immensely appreciate your help.
Thanks!
Thread Starter
Newbie
Joined: Jan 2019
Posts: 3
Likes: 0
W220 W221
Thanks for the speedy response Phil
I took it for diagnosis regarding the B4/9 sensor. No oyher codes appeared, the mechanics told me their system was not able to pick electronic faults. Will a better diagnosis tool do the trick? Or is there a more specific diagnosis you know of?
I took it for diagnosis regarding the B4/9 sensor. No oyher codes appeared, the mechanics told me their system was not able to pick electronic faults. Will a better diagnosis tool do the trick? Or is there a more specific diagnosis you know of?
Super Member
Joined: Feb 2009
Posts: 713
Likes: 214
From: Brooklyn, NY
2007 S550 4Matic 2013 S550 Base
Thanks for the speedy response Phil
I took it for diagnosis regarding the B4/9 sensor. No oyher codes appeared, the mechanics told me their system was not able to pick electronic faults. Will a better diagnosis tool do the trick? Or is there a more specific diagnosis you know of?
I took it for diagnosis regarding the B4/9 sensor. No oyher codes appeared, the mechanics told me their system was not able to pick electronic faults. Will a better diagnosis tool do the trick? Or is there a more specific diagnosis you know of?
Junior Member
Joined: Jan 2019
Posts: 18
Likes: 0
From: Detroit, MI
S550 w140, 07 S550
I have a whole COMAND unit for you for $350 (includes shipping to lower states). The only thing is the DVD player skips discs but the COMAND it'self works with no issues.
You can swap the dvd player portion from the old one you have.
You can swap the dvd player portion from the old one you have.
MBWorld Fanatic!
Joined: Oct 2012
Posts: 1,401
Likes: 312
CLK55 W209, CL63 W216
Sounds like either an internal fault or a power issue to me. The Comand HDD holds the navigation part of the software...the unit works fine without a hard drive at all...except for the navi part, clearly. The B4/9 sensor is a suspension sensor I believe.
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