GLK cold start rough idle issue

I have a GLK as well, and I went through something similar last year. Rough idling on cold starts, almost stalling sometimes. Turned out to be a fuel delivery problem traced to one of the injectors. It was a pain! Have you noticed any change in fuel efficiency or any unusual smells?

Thank you for sharing your experience. I have not observed any significant changes in fuel efficiency, nor have I detected any unusual smells. Could you elaborate on how you diagnosed the issue and what steps you took to resolve it? I am trying to determine if an injector test is the next logical step.

I didn't do the test myself. Honestly, I was as frustrated as you probably are now, and I took it straight to a workshop. They ran an injector test and confirmed one was bad. It’s probably best to get it checked professionally to be sure.

I appreciate your recommendation. I will schedule an appointment with my trusted workshop to perform a comprehensive injector test and fuel system evaluation. Following the diagnosis, I will proceed with the necessary repairs, which I anticipate will cost around 515€. Thank you again for your assistance.