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2015 C300 OBD codes DIY repair

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Old 07-22-2024, 11:55 AM
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C300 4matic
2015 C300 OBD codes DIY repair

I am getting the following codes, can someone advice if I can DIY or shop repairs required if they can show me how to do it





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Old 07-22-2024, 01:55 PM
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W204 2010 C300 4matic Sport M272
Is the check engine light on? How is the car running?

I see those are stored codes. Have you erased them, and they keep coming back?

I have a Foxwell NT530 and when I first got it there were a bunch of stored codes showing, I erased them and they havent come back and the car runs fun.

I had these codes under "stored", so i erased them and they never came back:




I havent really played around with it that much but i think you can go into Suspension System menu and see if you can find the specific problem with that current suspension code:








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Old 07-22-2024, 03:04 PM
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C300 4matic
Codes

Thank you for responding - initially there was a check engine light that came on and I erased it. I erased all the codes but they still keep coming back.
it all started when my wife left the lights on and the battery was dead in the morning and there was no ignition at all had to jump start and charge the battery over night.
The codes may have already been there as the car still runs and I never checked earlier for a while ??
Old 07-22-2024, 06:17 PM
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W204 2010 C300 4matic Sport M272
I dont have any personal experience with those codes and i hardly use my obd reader but i searched around for those codes and I would probably check the battery and charging system/alternator for the first two codes then the fuel pressure for the last one.

When you jump started the car and then when you charged the battery overnight where did you hook up to, did you hook directly to the battery posts, or did you use the jumping connections in the engine bay? How old it is the battery? Wondering if the battery is old or damaged and causing a low voltage fault once in awhile. Or maybe the alternator is not functioning properly.

I have an inexpensive battery tester, two of them actually and they tell me battery health, state of charge and even if the alternator is charging right. I wouldnt call them workshop level accurate but between the two im good with just ballpark readings. Your Foxwell should tell you battery voltage at least, with the car turned on and then when running. if you dont have a battery tester maybe get it tested somewhere along with the charging system.






For the P008A00 I would check the fuel pressure, when the car is turned on and then when running. Even drive around and see if the pressure changes, gets too low. Searching around for that code I came up with the fuel filter being one reason.



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Old 07-22-2024, 09:34 PM
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C300 4matic
Thank you so much for your advice, I charged the battery at the posts wheee you jump start and my charger told me it is fully charged and showed me a green light, I also got the alternator and battery checked at advance auto - so probably not the battery, I am wondering if the codes weee there before the battery got discharged and I noticed when I did a diagnostic the gear shift was behaving a little weird before the battery problem.
Is there a further diagnostic test to eliminate the ECU ? In your opinion.
i appreciate your opinion and input, I am retired and cannot afford much spending.

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