Repeated Injector Failure/Cracking on a 2015 C250 (W205)
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Joined: Oct 2024
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Mercedes C250
Repeated Injector Failure/Cracking on a 2015 C250 (W205)
A desperation call of sorts. The dealer is flabbergasted with this one and fails to formulate a clear course of action for fixing the issue. Even reaching out to Germany to the factory did not result in a clear answer. A fuel leak was traced to a cracked injector nozzle, was replaced twice, and twice again the newly installed injectors had the nozzles crack within a few miles of driving off the lot. No problems (leaks) with the other injectors whatsoever, no engine check or error messages that could trace the problems to another place... Help!!!
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Joined: Mar 2022
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2015 C400 4MATIC Palladium Silver Metallic
A desperation call of sorts. The dealer is flabbergasted with this one and fails to formulate a clear course of action for fixing the issue. Even reaching out to Germany to the factory did not result in a clear answer. A fuel leak was traced to a cracked injector nozzle, was replaced twice, and twice again the newly installed injectors had the nozzles crack within a few miles of driving off the lot. No problems (leaks) with the other injectors whatsoever, no engine check or error messages that could trace the problems to another place... Help!!!
Have they bore scoped the injector tube? I suspect either some kind of debris or malformed/poorly machined cylinder head where the injector seats into the head.
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Joined: Jun 2016
Posts: 462
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From: Panama City, FL
2020 C300, 2013 C250, 2000 Boxster S
I’m with TwoC400s. The bore in the cylinder head may be misaligned which is putting the injector under tension when it is screwed into the head. Eventually with heat cycling and tension the injector cracks.
