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Mercedes M Klasse Fuel Mixture Issue

My 2008 Mercedes M Klasse diesel engine is throwing fuel related codes at 283294 km Check engine light is on and the engine has stalled a couple times now usually when idling The codes point to an incorrect fuel composition I suspect a defective cable or plug connection Is this something I can troubleshoot myself Could a bad fuel filter cause this Or maybe the engine knock is related I hope it's not something major

A 2008 Mercedes M Klasse diesel engine was experiencing fuel-related issues, including error codes, a check engine light, and occasional stalling, particularly when idling. The suspected causes included a defective cable or plug connection, a clogged fuel filter, or possibly engine knock. After considering these possibilities, the issue was resolved by replacing a faulty cable connection, which aligned with the initial error code diagnosis.

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4 comment(s)

Sounds frustrating I had a similar problem with my M Klasse Did you check the fuel filter A clogged one can mess with the fuel mixture Was there any engine knock before the light came on Is it possible some bad gas got into the fuel system

Thanks for the quick reply So the fuel filter is something I considered but wouldn't that usually just cause a lack of power As for the engine knock I'm not entirely sure if it was there before the light It's subtle How did you resolve your issue Was it a simple fix or did you have to dive deep into the fuel system

In my case the engine knock was very noticeable It ended up being a faulty sensor but the symptoms were pretty much the same If you're not sure and especially with the stalling I'd suggest taking it to a workshop It could be a simple fix but it's better to be safe than sorry when it comes to the fuel mixture Do you want to risk causing more damage

Appreciate the advice Decided to take it to the workshop You were right it was a defective cable connection just like the error code suggested They replaced the faulty cable and the plug connection of the component and all seems well Cost me 95€ Thanks again for pointing me in the right direction

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MERCEDES

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MKLASSE