C300 W205 P0300 Cranks but no start
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Joined: Dec 2023
Posts: 1
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C300
C300 W205 P0300 Cranks but no start
All right guys so I've been having an issue with my 2015 C 300 W205. I had a fuel leak coming from the hose connected to the high-pressure fuel pump. I finally had time to fix it so I disconnected the battery and started taking apart the cover covering the high-pressure fuel pump i corrected the leak by simply taking off the OEM ring and replaced it with a hose clamp. Once the repair was complete I went in to start my car and it did not start it just turned over, I suspected that either one of my fuel pumps went out but I don't see how when the car was running perfectly fine before the only thing that I did notice was sometimes the car will have like a random misfire, but either way, I proceeded to check the fuel pumps the rear one seemed OK as you could hear it when you crank the car and the high-pressure fuel pump I didn't check the fuel rail pressure but I did disconnect one of the hoses and fuel just sprayed out when the pump primed so I figured it would at least try to start if it was defective but in my situation it doesn't even do anything I, the car did start up with starter fluid then it dies ended up changing the crankshaft sensor since I had changed it before with a AutoZone one I figured maybe the injectors aren't firing, after the swap I turned on the car and the car started but it ran really rough so I ended up changing my spark plugs which they were in pretty bad shape. I was going to do them already anyways, but they just gave me an opportunity to do it now after swapping the spark plugs the car did not start anymore now not even with started fluid I'm getting codes P0300, P0351,P0301, P0303, P0353
Newbie
Joined: May 2024
Posts: 2
Likes: 1
C300 base
Hi
All right guys so I've been having an issue with my 2015 C 300 W205. I had a fuel leak coming from the hose connected to the high-pressure fuel pump. I finally had time to fix it so I disconnected the battery and started taking apart the cover covering the high-pressure fuel pump i corrected the leak by simply taking off the OEM ring and replaced it with a hose clamp. Once the repair was complete I went in to start my car and it did not start it just turned over, I suspected that either one of my fuel pumps went out but I don't see how when the car was running perfectly fine before the only thing that I did notice was sometimes the car will have like a random misfire, but either way, I proceeded to check the fuel pumps the rear one seemed OK as you could hear it when you crank the car and the high-pressure fuel pump I didn't check the fuel rail pressure but I did disconnect one of the hoses and fuel just sprayed out when the pump primed so I figured it would at least try to start if it was defective but in my situation it doesn't even do anything I, the car did start up with starter fluid then it dies ended up changing the crankshaft sensor since I had changed it before with a AutoZone one I figured maybe the injectors aren't firing, after the swap I turned on the car and the car started but it ran really rough so I ended up changing my spark plugs which they were in pretty bad shape. I was going to do them already anyways, but they just gave me an opportunity to do it now after swapping the spark plugs the car did not start anymore now not even with started fluid I'm getting codes P0300, P0351,P0301, P0303, P0353
