E-Class (W212) 2010 - 2016: E 350, E 550
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The engine starts but then immediately stops

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Old Jun 28, 2025 | 08:35 PM
  #1  
landy77's Avatar
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W212(S212)
The engine starts but then immediately stops

I am Japanese.
Please forgive me if my English is strange.
If there are any parts that are difficult to understand, please let me know and I will retranslate them.

Nice to meet you, please help!

Vehicle information
W212
2014 model
E300
212255C
M276

It is right-hand drive.

The engine starts immediately without any problems.
Immediately (1-2 seconds), the idling becomes unstable, a hunting-like symptom appears, and the engine cuts out about 5-10 seconds after starting, and it cannot be started for a while.
When it cannot be started, it will crank but there is no sign of ignition.

If you turn on the accelerator while it is hunting, it will not stop during that time.

What I have done so far is

6 spark plugs

6 ignition coils

4 camshaft position sensors

4 camshaft solenoids (magnets)

.

The following error codes are detected by a simple diagnostic device.

P2092
P0346
P0010
P0020
P2088
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Old Jun 29, 2025 | 12:32 AM
  #2  
CaliBenzDriver's Avatar
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by landy77
I am Japanese.
Please forgive me if my English is strange.
If there are any parts that are difficult to understand, please let me know and I will retranslate them.

Nice to meet you, please help!

Vehicle information
W212
2014 model
E300
212255C
M276

It is right-hand drive.

The engine starts immediately without any problems.
Immediately (1-2 seconds), the idling becomes unstable, a hunting-like symptom appears, and the engine cuts out about 5-10 seconds after starting, and it cannot be started for a while.
When it cannot be started, it will crank but there is no sign of ignition.

If you turn on the accelerator while it is hunting, it will not stop during that time.

What I have done so far is

6 spark plugs

6 ignition coils

4 camshaft position sensors

4 camshaft solenoids (magnets)

.

The following error codes are detected by a simple diagnostic device.

P2092
P0346
P0010
P0020
P2088
Kombahoa, let me make sense with something helpful.dozo.

Your description reads exactly like a low fuel pressure issue.
Can you pls read fuel pressure both at tank and rail using data scanner.

codes are next to meaningless without context:
  • status active/stored
  • humanoid description
  • modules name
  • live data

What mileage is this engine : young or old ?
Campaï.


Last edited by CaliBenzDriver; Jun 29, 2025 at 01:11 AM.
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Old Jun 29, 2025 | 01:59 AM
  #3  
landy77's Avatar
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Joined: Jun 2025
Posts: 2
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W212(S212)
Thank you for your reply.
I’ll prepare and check the fuel pressure starting tomorrow.

I also realized I didn’t provide enough vehicle information.
Mileage: 168,000 km.
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Old Jun 29, 2025 | 03:21 AM
  #4  
streborx's Avatar
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From: Colorado
G550
Yes -- this sounds like a fuel delivery problem. Could be as simple as a clogged fuel filter, but checking the fuel pressure is the place to begin.
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