bm2amb

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.

alynch

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.

bm2amb

Yes, very frustrating... by the time i took to workshop, it works fine again

Moto_Guzzi

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-?

bm2amb

it happened few times, either full tank, 1/2 tank or low. also on High way and low speed.

bm2amb

@alynch

Workshop called today, they think its Front SAM issues, a very expensive part. and not 100% Guarantee fix.

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.

meazz1

@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.

bm2amb

@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?

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.

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 ?

Odd Piggy

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.