C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Stuck on the road twice, engine won't start

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Old Jun 7, 2023 | 10:23 AM
  #1  
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c220
Stuck on the road twice, engine won't start

My W204 C220 CDI (2008) Stuck on the road twice a day, lost power while driving.

from Dashcam and Camera

Video LInk:





DTC log is in the Video Description.

anyone got idea? very panicking.
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Old Jun 7, 2023 | 12:24 PM
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From: Panama City, FL
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Originally Posted by bm2amb
My W204 C220 CDI (2008) Stuck on the road twice a day, lost power while driving.

from Dashcam and Camera

Video LInk: https://youtu.be/JMea3ADxcV8





DTC log is in the Video Description.

anyone got idea? very panicking.
From the DTC log, it appears to be an electrical issue. The battery is definitely healthy, as the engine is trying to start, but it seems as if there is no fuel based on the DTC for the fuel pump. With so many different electrical circuits affected, I would look for a loose electrical connection on the ECM or one of the gateway modules since the problem is intermittent.
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Old Jun 7, 2023 | 07:20 PM
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Yes, very frustrating... by the time i took to workshop, it works fine again
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Old Jun 11, 2023 | 04:13 PM
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From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
Hi, I saw your tank was not full, and it cut out around a corner.
-Have you determined if it always happenes around corners, left or right-?
-Does it happenes with tank less than 1/4 full-?
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Old Jun 11, 2023 | 07:08 PM
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it happened few times, either full tank, 1/2 tank or low. also on High way and low speed.
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Old Jun 14, 2023 | 05:45 AM
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@alynch

Workshop called today, they think its Front SAM issues, a very expensive part. and not 100% Guarantee fix.
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Old Jun 14, 2023 | 12:55 PM
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From: Panama City, FL
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Originally Posted by bm2amb
@alynch

Workshop called today, they think its Front SAM issues, a very expensive part. and not 100% Guarantee fix.
With several different unrelated electrical codes, the front SAM would be one of the common denominators. I think it's a logical path. I have read of corrosion problems on the underside of the SAM so I would ask the shop to keep the old SAM and you can see if this is the culprit.
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Old Jun 14, 2023 | 05:05 PM
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Originally Posted by alynch
With several different unrelated electrical codes, the front SAM would be one of the common denominators. I think it's a logical path. I have read of corrosion problems on the underside of the SAM so I would ask the shop to keep the old SAM and you can see if this is the culprit.
@alynch
Does the SAM needs any coding or it's a direct replacement? I just googled and saw few used SAM on ebay for very reasonable price.

@bm2amb
How much did the shop quote for? I am sure they are going to get a brand new one.

Last edited by meazz1; Jun 14, 2023 at 05:09 PM.
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Old Jun 14, 2023 | 06:26 PM
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@alynch
I always got Fuel Regulator 1 and Fuel Pump DTC, it seems front SAM does not responsible for those items, would it be possible both SAM got problem or something else?
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Old Jun 15, 2023 | 01:59 AM
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I’m gonna stick my nose in here.
I had never heard of a pre-fuse bloc failure until seeing 2 on this forum in the last year or so. The pre-fuse bloc provides power to both SAMs. Before replacing the SAM, it might be worth pulling the pre-fuse bloc and checking the fuses. Mercedes does not sell individual fuses if you find any open (blown), and the pre-fuse box is also expensive. But inexpensive replacement fuses are available online or from electronics stores.
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Old Jun 15, 2023 | 02:07 AM
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Originally Posted by Odd Piggy
I’m gonna stick my nose in here.
I had never heard of a pre-fuse bloc failure until seeing 2 on this forum in the last year or so. The pre-fuse bloc provides power to both SAMs. Before replacing the SAM, it might be worth pulling the pre-fuse bloc and checking the fuses. Mercedes does not sell individual fuses if you find any open (blown), and the pre-fuse box is also expensive. But inexpensive replacement fuses are available online or from electronics stores.
I think the car is getting electricity, everytime i have to wait for 30mins to re-start the engine, doesn't mater if its cold or hot, is there any parts that have a time will auto restart ?
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Old Jun 15, 2023 | 11:58 PM
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Originally Posted by bm2amb
I think the car is getting electricity, everytime i have to wait for 30mins to re-start the engine, doesn't mater if its cold or hot, is there any parts that have a time will auto restart ?
That sounds like something is opening up or failing when it gets hot. I don’t know of anything that is time sensitive. Chasing phantom electrical issues is frustrating and gets expensive to just throw parts at. I agree with you that both SAMs failing is unlikely. So I wouldn’t recommend changing the front SAM on a maybe. The pre-fuse bloc is still a suspect, but so is the ECM itself and all the associated wiring.
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