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KlugerDieter

GLS Cruise Control Issue

My 2019 Mercedes GLS with a gasoline engine is showing a cruise control malfunction. It happened suddenly at 79271 km. An error message popped up, and the cruise control stopped working. I scanned it, and there's an error stored in the memory, but I don't have the specific code right now. I suspect it's a faulty system or a defective plug connection somewhere. Has anyone seen this before?

Summary of the thread

A 2019 Mercedes GLS experienced a sudden cruise control malfunction at 79,271 km, displaying an error message. The issue was suspected to be a faulty system or defective plug connection. A similar problem in another vehicle was traced to a faulty actuator connection near the steering wheel, suggesting checking wiring and plugs. Ultimately, the problem was confirmed to be a defective plug connection, which was resolved at a workshop.

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4 comment(s)

jessicaeagle1

I had a similar issue with my old BMW 5 series. Cruise control went haywire and threw an error. In my case, the problem was traced back to a faulty actuator connection near the steering wheel. Car electronics can be sensitive. Check the wiring and plugs associated with the cruise control actuator, especially around the steering wheel. A loose or corroded connection can definitely cause a malfunction. Is the error message persistent, or does it come and go?

KlugerDieter (community.author)

Thanks for the tip! The error message is persistent. Where exactly should I be looking around the steering wheel? I'm a bit of a novice when it comes to car electronics. I don't want to mess anything up further.

jessicaeagle1

Okay, persistent is not good. I am not going to recommend you start disassembling the steering wheel. Modern systems are pretty integrated. The steering wheel contains a number of components, and without proper tools and knowledge, you might trigger the airbag or damage something else. Based on your description, and the fact that the error is persistent, I would suggest taking it to a workshop to have the car electronics checked. I know it's not the answer you were looking for, but it's the safest one. They should be able to pinpoint the faulty system quickly.

KlugerDieter (community.author)

Thanks for the advice. I took it to the workshop. Turns out it was a defective plug connection, just like I suspected. They charged me 95€ to fix it. Appreciate the help!

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MERCEDES

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GLS