W163 ML400 - lethal dead stop while driving - Mercedes-Benz Forum
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post #1 of 16 (permalink) Old 08-01-2019, 05:51 AM Thread Starter
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W163 ML400 - lethal dead stop while driving

I was driving though a neighbouring village today when the EPC light came on.

I felt the car give a little 'jerk' like it was just about to die but it carried on.

Dropped my wife off and went for a little drive around very gingerly.

As I trundled gently down the road, the heater coil light appeared to flick on and the car literally just died. Like someone turned off the ignition while driving.

No power, no brakes, and no power steering. Luckily I was going slowly and managed to stop safely.

I attempted to start it a few times but it won't run longer than a couple of minutes - it seems it will run longer if left for a bit - ie something cools down.

Whilst waiting for recovery I did take some video of the lights as it happened which I am posting to utube. I've also taken some scans as well - I'll post some codes later.

Quite frankly it is scary as hell and I dread to think if it had been at 120mph on the motorway. Or my wife driving. I'd just got her used to driving it a bit, but she won't touch it now.

No car should EVER be able to stop just like that. It's how people get killed.

Back to our trusty 1995 Terrano yet again. It is simple. And bullet proof.
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post #2 of 16 (permalink) Old 08-01-2019, 05:56 AM Thread Starter
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Sorry I edited out the boring bits. It had been off for 20 minutes. Cleared all the codes and started it.

I can post the full thing but the rest is just waiting for stuff to happen.

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post #3 of 16 (permalink) Old 08-01-2019, 07:16 AM
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Originally Posted by reetp View Post
Sorry I edited out the boring bits. It had been off for 20 minutes. Cleared all the codes and started it.

I can post the full thing but the rest is just waiting for stuff to happen.

https://youtu.be/_Y81NpctNzI
You mentioned you cleared all codes what were the codes? It seems when the EPC lights up it can be several things throttle body, speed sensor, steering sensor, etc. Read a case where one gal was low on fuel went to put some in and smelled petrol instead of diesel coming from the filler. Problem solved after fillup. her thought after confirming that all her receipts were indeed diesel was a error at the station, been know to happen. Another case was Speed sensors he unbolted all of them cleaned them reinstalled problem solved. So it could be simple.

But one thing that can happen is limp mode, which you may be in.
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post #4 of 16 (permalink) Old 08-01-2019, 07:31 AM Thread Starter
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I have seen mention of people with dodgy fuel etc. but I am not overly convinced on that one in this instance.

It doesn't even seem to limp. This is a complete shut off when driving - engine literally dies. Almost like a relay or fuse on the ECU has been pulled.

Just exactly like the video with the difference being in that instance I was parked, and once the engine stopped I turned off the ignition and removed the key.

I'll get the codes I found on my Autel - I'm a bit all over the place at the minute trying to sort alternative transport etc. with friends arriving in a few hours for a long weekend.
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post #5 of 16 (permalink) Old 08-01-2019, 07:41 AM Thread Starter
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FYI before I properly dig out the stuff I recorded I saw these (it was all in a hurry trying to get wife home, get truck picked up and work off my phone at the same time....)

C1300 A7/3y6 (front left solenoid valve, hold pressure)
C1022 Fault in CAN communication control unit n3/10 (ME-SFI [ME] control unit)

B1040 CAN bus fault in communication Engine control module
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post #6 of 16 (permalink) Old 08-01-2019, 11:43 AM
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FYI before I properly dig out the stuff I recorded I saw these (it was all in a hurry trying to get wife home, get truck picked up and work off my phone at the same time....)

C1300 A7/3y6 (front left solenoid valve, hold pressure)
C1022 Fault in CAN communication control unit n3/10 (ME-SFI [ME] control unit)

B1040 CAN bus fault in communication Engine control module
Is that all of them or are there more?

Before this happened was any one poking around under the hood?

The first place to start is the battery connection good and no blown fuse, relay.
take a look here at our friends at MB world. Suggestion change relays see if issue follows:

Also some talk of washer fluid leaking on the ABS unit.

https://mbworld.org/forums/m-class-w...300-c1314.html

Hang in there keep updating us, team work will solve this.
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post #7 of 16 (permalink) Old 08-02-2019, 01:18 AM
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Quite frankly it is scary as hell and I dread to think if it had been at 120mph on the motorway.
This happened to me at 100 km/h but I didnít find it scary. More annoying and inconvenient.

I just pulled over to the side. Brakes and steering arenít as easy to operate without power, but you can still stop and steer - need to use more muscle.

Turned out to be the crankshaft position (CKP) sensor. Resistance increases when hot if faulty, may function again when allowed to cool down.
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post #8 of 16 (permalink) Old 08-05-2019, 04:50 AM Thread Starter
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This happened to me at 100 km/h but I didnít find it scary. More annoying and inconvenient.

I just pulled over to the side. Brakes and steering arenít as easy to operate without power, but you can still stop and steer - need to use more muscle.
I think it probably depends on the situation when it occurred... I was travelling slowly, nothing around, and could sense something was up, so my senses were turned up to 10 and expecting trouble.

My wife cruising down the motorway at 120 mph round a bend in traffic with the stereo on would not have agreed with you. Even at low speed it was extremely difficult to stop, and the steering was almost impossible to turn - the tyres on a ML400 are not exactly skinny..... YMMV.....

Quote:
Turned out to be the crankshaft position (CKP) sensor. Resistance increases when hot if faulty, may function again when allowed to cool down.
OK thanks - will check that. It was damn hot, and clearly somewhat heat related - the longer you left it off, the longer before it threw its hands in again. Though we are talking the difference between seconds and a few minutes.
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post #9 of 16 (permalink) Old 08-05-2019, 08:51 AM
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Originally Posted by reetp View Post
FYI before I properly dig out the stuff I recorded I saw these (it was all in a hurry trying to get wife home, get truck picked up and work off my phone at the same time....)

C1300 A7/3y6 (front left solenoid valve, hold pressure)
C1022 Fault in CAN communication control unit n3/10 (ME-SFI [ME] control unit)

B1040 CAN bus fault in communication Engine control module
Start monitoring voltage.

https://www.benzworld.org/forums/w16...education.html

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post #10 of 16 (permalink) Old 08-05-2019, 10:17 PM
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[QUOTE=Witek_M;17858560]
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Originally Posted by reetp View Post
Witek interesting you mentioned that, Not that it stalled out, but my sister just had an incident with her 2yr 11 month forester.

She was driving and every warning light on the dash lit up. Into the dealer under warranty, they changed brake switch.

1day later same thing back to dealer, they replace them the ECM. 2 days later the same every light.

Back to dealer they choose the alternator to replace. Since the 26th of July problem seems solved., turns out there was even a service bulletin on it.

Just goes to show some issues stump even the dealer.
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