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Mercedes GLA cold start problems

I'm experiencing an issue with my Mercedes GLA from 2013. It's a gasoline engine with approximately 118040 km. The engine exhibits poor running during the cold start phase, and the vehicle starts with difficulty. I suspect a faulty cold start injector. Could this be related to a fuel injection problem, perhaps a defective injection valve? I've noticed some engine misfire during the initial rough idle. Any insights into performing an injector test or checking the fuel delivery system would be greatly appreciated.

4 comment(s)

Sounds familiar! I had a similar issue with my GLA. Rough idle on cold starts and a bit of hesitation. I'd bet it's your fuel injector. Did you notice any drop in fuel efficiency or a persistent check engine light?

Thank you for your response. I haven't observed a significant drop in fuel efficiency, but the check engine light does illuminate intermittently. Could you elaborate on how you diagnosed the issue with your GLA? Was an injector test necessary, or were there other indicators that pointed to the fuel injector?

In my case, the check engine light was the main giveaway, along with the rough idle of course. I tried a fuel injector cleaner first, but no luck. Ultimately, I took it to a workshop. They ran an injector test and confirmed one was definitely faulty. Saved me a lot of guesswork. Best bet is to get it properly diagnosed to be sure.

I appreciate your advice. I'll schedule an appointment with my trusted workshop to perform a comprehensive injector test. It seems the most prudent approach. The estimated repair cost is around 515€. Thank you again for sharing your experience and helping me narrow down the problem.

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