emilykrause1

Mercedes CLA AdBlue issue and engine start problem

I have a 2016 Mercedes CLA diesel with 166678 km. I'm getting an error that the AdBlue tank is empty, even after topping it off. The error is in the speedometer and the error memory, and now the engine won't start. I think the AdBlue output from the tank to the dosing unit is bad. Has anyone seen this? Could this affect the injection system or fuel efficiency? What's the AdBlue tank capacity usually? I'm trying to avoid high repair costs. I saw one estimate of 250€ for a tank replacement.

A 2016 Mercedes CLA diesel owner is experiencing an issue where the AdBlue tank is reported as empty despite being topped off, leading to an engine start problem. The suspected cause is a malfunction in the AdBlue output from the tank to the dosing unit. A similar issue was resolved by taking the car to a workshop, suggesting professional inspection and repair as a viable solution.

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4 comment(s)

Whoa, sounds rough! I had almost the exact same thing happen with my CLA. The AdBlue system is a pain. Is the service light on too?

Yes, the service light is on. Can you tell me more about what happened with yours? Did you have the same symptoms, like the engine not starting? How was it fixed and how much did it cost?

Yep, same symptoms. Wouldn't start, error message, the works. Honestly, I didn't mess with it myself. I took it straight to a workshop. They sorted it out, but I can't remember exactly what they did. Saved me a headache though!

Thanks for sharing. It helps to know my symptoms match a known issue. I'll book an appointment with a good workshop to check out the AdBlue system problem. Your info was really helpful.

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MERCEDES

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CLA