tgl3
Member
- Joined
- May 27, 2020
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- Your Mercedes
- Mercedes C-Class C220 CDI Coupé 2011
Hello all my friends!
Hope this thread finds everyone well! Last Monday, I was driving my C220 CDI COUPE (2011 Reg, C204) on the motorway. The car was all fine until the moment I was trying to overtake a car and hardly depress the gas. As soon as I depressed the gas and rev hit 3000 RPM, there were some "ka ka ka" rattling noise starting arisen from the engine! I never heard that weird noise before so for precaution I immediately reduced my speed and pull over at the hard-shoulder. AA roadside assistance was then called out and the mechanician couldn't fix the issue at the scene. So the car was then towed to a "AA Approved Garage" near my home waiting for diagnosis and repair at the next day (I have the AA Breakdown Repair Cover. To make a valid claim, the car must be repaired at one of AA Approved Garages. I used to repair and service my car at another local garage).
On the next day morning, after OBD scanned over my car, the garage informed me that "Multiple air and pressure related faults stored, we will need further investigation to establish the issue." A £85 investigation cost was then charged and the investigation began. No update since then until the following day, I was told by the garage that "
Air leak test completed, no faults found. Mercedes technical support have been contacted and have produced a test plan for the issue. Test plan followed and we have found an issue with the fuel delivery timing. The timing of the fuel delivery is predominantly controlled by the injectors and engine control unit. The next stage is to remove the injectors and send for independent testing. Price is for injector removal and testing, this process takes 3-5 days.". A further testing cost of £269 was requested. There's nothing I could do at this stage so I authorised the request and let the test went on.
No update since then until today. I have been updated with the following message: "ALL 4 injectors have failed, we have to wait for some more info but the testing company has said that the way they have failed suggests that the fuel delivery system may be contaminated and a foreign object has gone through and damaged the injectors. This isn't good news as it means we would need to strip the whole fuel system apart and it may be a worn high pressure fuel pump starting to break up. Once I have had more info I'll chat it through with thechnician and see what options we have. At the very least it will need 4 injectors...".
I am feeling really hopeless now... Not only because costs that definitely will be incurred has reached the mark of £1800; more unknown costs seems like be there waiting for me (The garage told me they need to "strip the whole fuel system apart"; costs will be incurred. If NEW high pressure fuel pump required, £££ will be incurred... I have no idea about the fuel pump replacement cost but after searching on the internet it looks like pretty expensive...)
During the past year the car has underwent two repairs: during the first repair the Exhaust Back Pressure Sensor and the Boost Pressure Sensor for low-pressure turbocharger were replaced due to two error codes related to them. About two months after the first repair, one day the car suddenly dropped into limp model and EML went on; on that occasion two similar error codes were identified and the root cause of the codes was believed due to the faulty MAF sensor therefore the MAF sensor was replaced. The car ran like a dream since the second repair for half a year; no any broken down or faulty symptom until the last Monday.
The car has 140k mileage on clock. I always treat the car very well. Fuelled up it with BP Ultimate Fuel, service it as soon as its due, washed it regularly, and repairs it if any faulty symptom detected... I don't think if I caused the foreign object flowed into the fuel system. I do believe there's definitely something wrong with the car, because for all the three times broken down there were error codes related to the Back Pressure Sensor. BUT the question is: for this time is it really the fuel delivery system faulty? and are four injectors really ALL failed and needs to be replaced? I don't know if the garage is dishonest; the garage doesn't seems like have a good reputation whilst some reviews claimed the garage charged them for parts that's not necessarily to be replaced and tried to make more money. The previous two repairs costed me in average of £350 but for this time... Not anymore!
No black smoke visualized at the point of breaking down and the EML didn't turn on. I didn't try to accelerate since the noise arisen so don't really know if the power loss exists. The only symptom I found at this time was the "Ka Ka Ka" disrupted noise from the engine, which was intermittent when engine loads up and persistent/obvious when engine is idle (according to the mechanic attended the breakdown recovery the noise seems from the camshaft).
Any suggestions or ideas at this stage from all intelligent friends here? I am keen to hear some suggestions from third-parties about my situation
And thank you in advance for spending your time read my long story and all helps given
Hope this thread finds everyone well! Last Monday, I was driving my C220 CDI COUPE (2011 Reg, C204) on the motorway. The car was all fine until the moment I was trying to overtake a car and hardly depress the gas. As soon as I depressed the gas and rev hit 3000 RPM, there were some "ka ka ka" rattling noise starting arisen from the engine! I never heard that weird noise before so for precaution I immediately reduced my speed and pull over at the hard-shoulder. AA roadside assistance was then called out and the mechanician couldn't fix the issue at the scene. So the car was then towed to a "AA Approved Garage" near my home waiting for diagnosis and repair at the next day (I have the AA Breakdown Repair Cover. To make a valid claim, the car must be repaired at one of AA Approved Garages. I used to repair and service my car at another local garage).
On the next day morning, after OBD scanned over my car, the garage informed me that "Multiple air and pressure related faults stored, we will need further investigation to establish the issue." A £85 investigation cost was then charged and the investigation began. No update since then until the following day, I was told by the garage that "
Air leak test completed, no faults found. Mercedes technical support have been contacted and have produced a test plan for the issue. Test plan followed and we have found an issue with the fuel delivery timing. The timing of the fuel delivery is predominantly controlled by the injectors and engine control unit. The next stage is to remove the injectors and send for independent testing. Price is for injector removal and testing, this process takes 3-5 days.". A further testing cost of £269 was requested. There's nothing I could do at this stage so I authorised the request and let the test went on.
No update since then until today. I have been updated with the following message: "ALL 4 injectors have failed, we have to wait for some more info but the testing company has said that the way they have failed suggests that the fuel delivery system may be contaminated and a foreign object has gone through and damaged the injectors. This isn't good news as it means we would need to strip the whole fuel system apart and it may be a worn high pressure fuel pump starting to break up. Once I have had more info I'll chat it through with thechnician and see what options we have. At the very least it will need 4 injectors...".
I am feeling really hopeless now... Not only because costs that definitely will be incurred has reached the mark of £1800; more unknown costs seems like be there waiting for me (The garage told me they need to "strip the whole fuel system apart"; costs will be incurred. If NEW high pressure fuel pump required, £££ will be incurred... I have no idea about the fuel pump replacement cost but after searching on the internet it looks like pretty expensive...)
During the past year the car has underwent two repairs: during the first repair the Exhaust Back Pressure Sensor and the Boost Pressure Sensor for low-pressure turbocharger were replaced due to two error codes related to them. About two months after the first repair, one day the car suddenly dropped into limp model and EML went on; on that occasion two similar error codes were identified and the root cause of the codes was believed due to the faulty MAF sensor therefore the MAF sensor was replaced. The car ran like a dream since the second repair for half a year; no any broken down or faulty symptom until the last Monday.
The car has 140k mileage on clock. I always treat the car very well. Fuelled up it with BP Ultimate Fuel, service it as soon as its due, washed it regularly, and repairs it if any faulty symptom detected... I don't think if I caused the foreign object flowed into the fuel system. I do believe there's definitely something wrong with the car, because for all the three times broken down there were error codes related to the Back Pressure Sensor. BUT the question is: for this time is it really the fuel delivery system faulty? and are four injectors really ALL failed and needs to be replaced? I don't know if the garage is dishonest; the garage doesn't seems like have a good reputation whilst some reviews claimed the garage charged them for parts that's not necessarily to be replaced and tried to make more money. The previous two repairs costed me in average of £350 but for this time... Not anymore!
No black smoke visualized at the point of breaking down and the EML didn't turn on. I didn't try to accelerate since the noise arisen so don't really know if the power loss exists. The only symptom I found at this time was the "Ka Ka Ka" disrupted noise from the engine, which was intermittent when engine loads up and persistent/obvious when engine is idle (according to the mechanic attended the breakdown recovery the noise seems from the camshaft).
Any suggestions or ideas at this stage from all intelligent friends here? I am keen to hear some suggestions from third-parties about my situation
And thank you in advance for spending your time read my long story and all helps given
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