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manuelmueller6

Mercedes X Klasse diesel preheating lamp issue

My 2020 Mercedes X Klasse diesel has an issue The preheating lamp stays on after starting and there's an error stored I suspect a defective glow plug Has anyone had similar issues like rough idle or cold start problems due to glow plug failure I'm estimating a repair cost of 440€

Summary of the thread

A 2020 Mercedes X Klasse diesel is experiencing an issue where the preheating lamp stays on after starting, and an error is stored, likely indicating a defective glow plug. This problem is associated with symptoms like rough idle and cold start difficulties. The suggested solution is to have the vehicle checked at a qualified workshop to confirm and replace the faulty glow plug.

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4 comment(s)

MarkusWheels

Sounds familiar I drive an X Klasse too Engine light was on, same as you described Did you notice any difference in performance, especially when the engine is cold

manuelmueller6 (community.author)

Regarding performance, yes, there is a slightly rougher idle than usual, particularly during the initial cold start Is this consistent with what you experienced before resolving the glow plug issue

MarkusWheels

Yep, that's pretty much how it went for me Rough idle on cold starts was the first sign Glow plugs, huh You're probably on the right track I'd recommend taking it to a workshop to get it checked out properly They can confirm the faulty glow plug and replace it

manuelmueller6 (community.author)

I appreciate your input and confirmation of similar symptoms I will proceed with scheduling an appointment at a qualified workshop for diagnosis and repair Thank you again for your assistance

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MERCEDES

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XKLASSE