E-Class (W212) 2010 - 2016: E 350, E 550

Diagnosis Please Wait Error Message

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Old 05-27-2021, 06:57 AM
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W212
Diagnosis Please Wait Error Message


Is this an indication for an update?
Old 05-27-2021, 02:42 PM
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MY'14 W212 M276 3.5NA @55kMi
I don't believe W212 firmware updates come OTA. 🤣

Map traffic data comes through XM satellite
and mBrace through 4G cellular network.

As far as seeking a dealer update your frozen screen looks like a candidate for $200 service.

There are reported problems with Bluetooth and adressbook sync issues.

Last edited by CaliBenzDriver; 07-01-2021 at 07:53 PM.
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Old 05-28-2021, 10:01 AM
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12 E350 4Matic 13 E350 4Matic AMG Sport
You can try disconnecting your battery cable for ten minutes to see if it will reset itself.
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Old 05-28-2021, 11:32 AM
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2012 E550 sedan 2019 E63 Wagon
That looks like when a device is plugged into the OBD2 port.
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Old 05-28-2021, 11:46 AM
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When you plug in a diagnostic tool into the car and access the NTG HU5 unit, it shows that on the screen. Its been that way for decades. What's plugged into your oBD port? I have heard of modules like the Progressive snapshot tool causing these kind of issues.
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Old 07-01-2021, 07:48 PM
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W212
Originally Posted by Gram Antoine


Is this an indication for an update?

I ended up making an appointment and as expected they overlooked this problem; not one thing plugged into the ports and all the fuses are good
Old 07-01-2021, 07:57 PM
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MY'14 W212 M276 3.5NA @55kMi
I guess there is no way to navigate screen menus to initiate a "settings reset". Have you tried to ODB scan the unit and reset it from within scanner menus?
If that does not do the trick... then the module may need to get worked on internally or replaced.

Last edited by CaliBenzDriver; 07-03-2021 at 09:51 PM.

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Old 08-06-2021, 09:31 AM
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Originally Posted by CaliBenzDriver
I guess there is no way to navigate screen menus to initiate a "settings reset". Have you tried to ODB scan the unit and reset it from within scanner menus?
If that does not do the trick... then the module may need to get worked on internally or replaced.
4k just to replace the unit itself. Hopefully it comes with a glass of champagne!


Old 08-06-2021, 01:40 PM
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'11 E350, '11 E550, '98 M3, '95 E320
More like lube…
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Old 08-06-2021, 03:47 PM
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2008 E350 (W211 @170K), 2012 ML350 (W166 @119K), 2014 E350 Sport (W212 @96K), 2015 ML350 (W166 @92K)
Do you have any media in the unit? Say
1 - CD/DVD -> Eject to see if it works
2 - Memory card --> Take it out
3 - Anything connected in the port (within the center armrest console?

Once there is nothing in the unit, press the ON button until both of the following happens
1 - The system shuts down and you can hear the hard drive click, and turn itself off
2 - The system stays off for a bit, and then you should get the "Mercedes Benz" or "AMG" displayed on the screen

The above is a computer shutoff/forced restart procedure like a desktop/laptop computer.. Fingers crossed because that estimate hurts.
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Old 08-07-2021, 01:19 AM
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'11 E350, '11 E550, '98 M3, '95 E320
Originally Posted by juanmor40
Do you have any media in the unit? Say
1 - CD/DVD -> Eject to see if it works
2 - Memory card --> Take it out
3 - Anything connected in the port (within the center armrest console?

Once there is nothing in the unit, press the ON button until both of the following happens
1 - The system shuts down and you can hear the hard drive click, and turn itself off
2 - The system stays off for a bit, and then you should get the "Mercedes Benz" or "AMG" displayed on the screen

The above is a computer shutoff/forced restart procedure like a desktop/laptop computer.. Fingers crossed because that estimate hurts.
I would try the above, pulling the command fuses for 10 minutes and disconnecting the battery for 10 minutes (each separately).

Before throwing in the towel…
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Old 08-07-2021, 05:32 PM
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2010 E550, 273 Engine: 2012 S550, 278 Engine
Does this car have the “Hang Up - 1 - #” entry to the hidden menu? You might be able to do a better RESET there if this menu is available for you.
Old 08-16-2021, 09:28 AM
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Mercedes Benz cls550
Hi did you ever found out the problem with the diagnosis please wait screen my car is showing the exact same message

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