kunz

I was stuck in bumper to bumper traffic and answered a call with bluetooth when the COMAND screen just went completely blank. Restarting the car did nothing but I do still have all the radio/video/nav functioning. I even removed the head unit to see if any wires had come loose, but hadn't. Has this happened to anyone here? The car only has 1.1k, hopefully it isnt a bad omen.

Baby G

I had thr command system reboot on me once as well. Hasn't happened again, so not worried.

NYCGLK

weird, knock on wood but Command has been perfect for me

GLK4MATIC

Damn another problem to worry about with our GLK's *sighs*

kunz

I know...Haven't gotten the video screen back yet. Planning another trip to the dealer on Monday. I hope it is a simple solution.

kunz

Quick Update: Just came back from the dealer. Final diagnosis is a faulty LCD screen, will be replaced tomorrow.

I hope mine is an isolated case but something to look out for.

NYCGLK

thanks for the update

Baby G

Thanks Kunz...

JT-27

Ours has done this twice now. Start the car and go, and the COMAND screen doesn't come on. It happened again today, we will be making a trip to the dealer very shortly...

MBRedux

Let's hope the new one holds up better. But if it startes happening to more than we see here, I wish they would replace ours (if it happens) with one with a better contrast ratio.

dchansen

It has happened to me three times already and I only received the vehicle 3 days ago. Very painful indeed. I'll head to the dealer on Tuesday. Annoying for sure!!!!

kunz

hopefully this doesnt become an issue later on...i looked at the repair bill before the receptionist took it away, that screen is a $1300 part.

MBRedux

Do you know if they needed to dismantle the entire dash?

MBRedux

What's the build date of your GLK? The date is along the top of the sticker inside the drivers door.

kunz

my car's build date was 7/09 and i bought it on 8/7. They told me they had to take apart alot to reach the screen, but was completed within one day.

MBRedux

Our GLK was built two months later on 9/09.... picked it up the last week of the month. From factory to our door in less than 4 weeks.... not bad! So far so good on the screen too. Hope it lasts.

Thanks for the post!

NYCGLK

Yea if you get into production cycle right it's really quick. Also the main port is in Maryland on East coast so that saves a few days on shipping.

dlinjuly2009

My command screen went blank on me when I started up this morning. There was nothing on the screen when I reversed ( I have back up camera) and nothing when I pressed the navi button. I just picked up car last wed. and it was a sept production.
Also, prior to this I noticed the hazard light in the middle of the top console would be lit up in red even though I had not turned it on. Otherwise everything seems to be fine. Just contacted my dealer. Will let you know what happens.

dlinjuly2009

I went back to my car at noon and without doing anything the Comand screen came back on again. Don't know what happened in between except it rained a lot overnight when it was parked outside and had time to sit inside the past couple of hours.

MBRedux

You lnow the fuse box is under the hood on the drivers side. It's also exposed to the elements (rain, snow, etc) so check to see if the cover is on tight...

Also if it happens again, stop the engine, get out of the car, close all doors, lock the car using the key remote, then open the car, get in, start engine.... each time the car goes through this cycle, it resets the system.... please let us know what happens. If you go to the dealer, ask them why it went off and then came on without reason.

Good luck

Baby G

I have a feeling my nav is gonna go soon enough... Its like a TV just turning off, and the command resetting itself to come back on...

dlinjuly2009

Thanks, MBRedux. It seems to be working fine now. Could be due to the fact that I had turned the engine off, and on again after 3 hours. This "reset" as you call it is probably the same like resetting a computer when you have a problem. This is logical as the Comand is a computer after all.

DLM

I cannot Thank you enough for posting this! I literally spent 4 hours driving to two different Mercedes dealerships today to NO AVAIL trying to track down a code and checking fuses etc. and they wanted to sell me a diagnostic and new navigation system. It's very frustrating for a woman to go into a dealership as they usually up-sell and oversell an issue it was a really frustrating day, and before I spent the money, I thought I would do more of my own research and found your post. THANK YOU SO SO SO SO Much! I did what you said and locked and unlocked the car and started it and it works PERFECTLY~ Thank you, and bless you for taking the time to help others.

bop11

This is a problem in the screen (HMI) program. Restarting the car does not help. The system has to be down long enough with all the doors closed to allow the system to reboot. I had a 2010 that did this bout twice a year. I never tried MBRedux's solution, but I do know that if you turn it off, remove the key, get out and close the doors, wait about 5 to 10 minutes, when you open the door the system will reboot and probably work fine. You need to wait long enough to have the capacitors in the system discharge so it will fresh boot. Just like the blue screen of death in Windows, sometimes you hope that Microsoft didn't program your car.
Put 115,000 on it and the system worked well except those two times a year. It even happened at the dealer once but they were baffled.

Yaz Al

If you have this issue and you haven't had it fixed yet then check these two fuses in the engine compartment. You can replace fuse 26 and fuse 11. I replaced these two fuses on my Mercedes-Benz E220 SE CDI 7G-Triptronic. This could have cost me hundreds and hundreds of pounds if I took it to a mercedes dealership.
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