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

W204 codes P0300 P0301 P0302 P0303

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Old 12-20-2020, 10:33 AM
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Mercedes Benz C250
W204 codes P0300 P0301 P0302 P0303

2012 with 115k miles. I was going up a hill with cruise on the car immediately “choked” out and started shaking somewhat.

I’m pretty certain it had a high pressure fuel pump issue going on beforehand. Before this, If I gave it throttle it would hesitate like it’s not getting appropriate fuel

but anyways Limped it back home, plugged in the scanner and came back with those codes. Just sitting idling it’s fine but when throttle is applied or dropped into gear it starts misfiring.

Weird coincidence but I ordered coils for it last week and I already have the HPFP. Just waiting on those stupid clic-r clamps for the fuel line.

any suggestions? I’m hoping it’s not a cat-converter or needs head work. Any luck the coils and hpfp will clear it up

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