johannesschulze17
GLA Diesel Intake Flap Issue Reduced Power
Summary of the thread
A 2014 Mercedes GLA diesel is experiencing reduced engine power, rough running, jerking during acceleration, increased fuel consumption, and a loud hissing noise. These symptoms suggest a potential issue with the intake manifold flap control, possibly due to high mileage. A similar case was resolved by addressing a faulty intake system, and a professional diagnosis confirmed the intake manifold flap control as the problem, leading to successful repair and restored performance.
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4 comment(s)
johannesschulze17 (community.author)
Thanks for the input. Where exactly did you find your air intake leak? Was it throwing any specific codes?
peterstar9
I didn't locate the leak myself. I took it to a shop. They confirmed it was the intake manifold control. It cost around 465€ to fix. I'd suggest getting a professional diagnosis to be sure.
johannesschulze17 (community.author)
I appreciate the advice. I've confirmed the issue is the intake manifold flap control. The repair is complete at a similar cost. Performance is restored. Thanks for sharing your experience.
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MERCEDES
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GLA
peterstar9
I had similar symptoms on my GLA. It was diagnosed as a faulty intake system. Loss of power and engine misfire were noticeable. Have you checked for air intake leaks?