Injector operates

[CheresX]

Greetings everyone, I recently acquired a 2015 e220d Nite Edition at an advantageous price. There are several shortcomings associated with it. The primary codes are P027254 and P026654 (indicating a deficiency in the calibration of operating parameters for cylinders 2 and 4); I have verified with Autel that all injector codes correspond. Does anyone have any suggestions?

[WordSmith]

Consider utilising an injector cleaner additive and executing a smooth running calibration with Xentry prior to substituting the injectors.

[CheresX]

Thank you, I will attempt it initially.

[jimmy47785]

Are you aware if these injectors have undergone refurbishment?
I contend that the codes become inconsequential thereafter

[CheresX]

Regrettably, I possess no records regarding the vehicle. Acquired at a bidding event.

[jimmy47785]

Others might disagree with me, but I am convinced that the ECU will adjust the injectors as time progresses and with usage. If they are able to function within specified limits.

However, I am merely an individual online who believes he possesses some knowledge.

[CheresX]

I will introduce some cleaning solution into it and operate it for a period. To be fair, it operates adequately without emitting black smoke, although the fuel efficiency is merely 32.5.

[DSM10000]

Should a professional establishment refurbish and re-evaluate the injector on a specialised testing apparatus, it will produce a new calibration code indicative of its revised internal components. You are required to input this new code into the ECU.
If solely the internal components are substituted while the external casing/original code remains intact, certain economical rebuilders retain the original stamped code.

[Rashman4u]

I believe it is not straightforward; there appears to be a missing code, but could you explain the values that the ECU is adjusting for various pressure ranges for each injector? Unable to locate any screenshots online, yet SDS at least displays them... I recall a comparable situation from the past... yet I cannot recollect the resolution.

[Rashman4u]

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