Donatqq

Hello guys i have a problem with my mercedes e class 2015 my command keeps rebooting by itself and i cant seem to find a fix for it can anyone help?

bmwpowere36m3

Start by fully charging the main battery, then disconnect it for 10 minutes and reconnect.

Donatqq

Didnt work man my navigation isnt working either it doesnt show anything

CaliBenzDriver

Can you make sure NOTHING is connected to it either by BLUETOOTH or directly by USB-wire.

So turn off BT on ALL nearby phones that are paired. I recall summarizing a looong thread about that issue..., perhaps it applies to ya.
🤞

Donatqq

Actually the problem started happening when i was connecting my phone to bluetooth and it just suddenly didnt let my phone connect and started rebooting

CaliBenzDriver

Now that you know what is causing this issue, you may want to locate that existing thread I mentioned to understand solutions.

Double check... but I sort of recall this may be caused by answering NO to access requests to Address book, Messages and the likes...

Delete existing pairings then Retrain "properly" to avoid the Reboot condition.


FYI : recently I was helping a friend of mine with iPhone pairing issue on his 2021 Lexus.... Make sure your phone name is vanilla without any foreign letter characters, specifically double-bytes chars. iPhone handles this well but car does not!!

bmwpowere36m3

I was envisioning it rebooting in a repetitive cycle, never fully booting up. What’s the frequency of rebooting? Is it tied to any button presses or events?

*nvm*

looks like you guys are on the right track…

Donatqq

my problem is that the monitor keeps turning on and off repeatedly i cant use navigation or bluetooth

juanmor40

Not sure if Cali's thread mentions the following:

• another thread for a 2012 SLK 350 had a similar problem, and the unit refused to delete the paired phones. From there, the advice is to remove your car from the Bluetooth list of any phone close by, turn them off and then proceed to reset your COMAND. You do not want "external disturbances" while resetting your car.
• same thread above similar problem for 2014 SLK 350, but the problem was a "loose connection to the ring"

Good luck

===
The computer booting process has some asynchronous steps, and it could be trying to connect to close by paired phones before other parts of the operating system are completed and if the connection process fails for some unexpected reason the booting process bails out; therefore, a restart .

Senecat

It's just a computer. Manual hard reboot. Don't lock yourself out with too many failed attempts/variations in procedure:

1) Turn ignition to ON
2) Press and HOLD the ON/OFF button til you hear a beep
3) Computer will reboot/splash screen will display

ygmn

DO you have Sirius radio activated?
That caused mine to do the same as you mention.
work for 10 secs then lock up then reboot.

My fix was ensure Sirius is not activated and yell at sirius when they give out the free week

Donatqq

how do i make sure Sirius is not activated

juanmor40

As Senecat indicated, the COMAND is just a computer, and in this case seems to be in an infinite boot loop (seen in Android phone, Windows laptops, No OS laptops, etc). In general the solution is a reset, but some situations the reset must be "harder" than others. I am sure at this point you do not mind loosing your COMAND settings

Expanding from https://mbworld.org/forums/e-class-w...r-message.html

1 - Remove/Disconnect any peripheral the COMAND unit could interact with2 - Once there is nothing physically, or referencing the unit, you proceed with a "forced restart". That is, press the ON button until BOTH of the following happens3 - From bmwpowered36,4 - If the above fails, update the thread and look for more suggestions (like pulling the unit out so see nothing is loose)

=== Sep-23 Update ===
Have anyone seen this video?


In particular, the 4th case. It mentions that by turning ON-OFF the units 25 times , some codes will be stored. Are there other "tricks" for these head units?

===============
I am sure some of you have seen laptops with these nasty boot loops.
I have bought a few laptops from Ebay listed as "Not working for parts" which are described as "Fail to boot to BIOS, Power button lits up, FAN spins and then Shutdown".
Here is what I have done that so far have worked
- Disconnect the battery if any (most for parts Ebay laptops come without)
- Opened and remove the "infamous to me" coin battery
- Press the power button at least 20 seconds
- Connect memory if missing
- Connect a good power supply. I prefer a minimum of 90 W, but since I have 200W I used that one all the time
- By now the LED indicating charging should be lit
- Press power button UNTIL the FAN spins and the machine turn itself OFF again
- Press power button and wait for the laptop to cycle through the hardware checkup
- Boom.. Manufacturer logo shows on the screen,
- No OS found message.. We got a new laptop to be rebuild, the last resuscitated one is going to be my XENTRY laptop in the garage.

Does it sound familiar compared to these cars? Disconnect the main battery, wait for system to reset, reboot?
I wonder if there is a booting back door to the COMAND, i.e. takes the developer to the "BIOS" if exists and then able to reset a few settings and then reboot.

Donatqq

Still not working man i tried everything you guys told me to i think the problem is with the bluetooth but i cant seem to figure it out

Senecat

Post a video of a reboot.

ygmn

Did you have sirius before?

So you pulled the 2 fuses? I forget numbers

WEll time for dealership...

HOw long you owned car?
Maybe a software update will cure your issue...

All I know is too much computer in the radio system... and too much MB's version of BLUE SCREEN of DEATH.

Donatqq

Dealership says i need to change my radio i think thats the problem

ygmn

WHat happens if you pay for radio but does not fix the issue?

are you out the $$$$$

Donatqq

welp if that dont work i dont know what else to do man i hope switching the radio will fix it

juanmor40

At this point the radio is not the problem. The source of what make the radio fail is the problem; otherwise, the new radio may not solve it immediately or worse it will fail again w/o any predictable timeframe, say a week or just after the warranty on the new expires.

Changing parts w/o understanding the source of the failure is a Russian roulette game.

Donatqq

at this point man im just tired i hope a new radio is gonna fix it

juanmor40

I understand; however, keep in mind the dealer will not get tired of giving you answers (right or wrong) as long as you keep paying.

Did the dealer give you a source of the problem? Even something as lame as it is a wear item.

Did they show you the summary diagnostic from their XEntry/DAS (whatever they used)?

I hope it is replaced under warranty (or extended warranty), or it is going to pricey $$$

Donatqq

So i went to like 3-4 dealers and they all said the same thing i should change my radio thats why i believe them cause firstly i didnt believe it

konigstiger

If you paid any/all of these dealers have one revisit at no cost, and as suggested, provide a Xentry quick test summary confirming exactly what is malfunctioning. It may be the radio but can also be any other device in the MOST loop.