Mercedes A Klasse Hybrid Exhaust Flap Issue

I have a similar A Klasse, though I haven't checked the build year details recently. I did experience comparable symptoms some time ago. The louder exhaust noise and the error codes do sound familiar. Is the noise consistent, or does it fluctuate? Have you noticed any changes in fuel consumption or engine performance alongside the exhaust noise? It might also be worth checking the exhaust components for any visible damage or corrosion before assuming it is solely the exhaust flap.

Thank you for your response. The noise seems more pronounced during acceleration and after a cold start, then becomes somewhat consistent. I have not observed any significant changes in fuel consumption or engine performance. Could you elaborate on which exhaust components I should inspect specifically? I am not particularly experienced with exhaust repair, so any guidance would be appreciated.

While a visual inspection might reveal obvious issues like rust or a loose connection, diagnosing exhaust valves problems without proper tools can be tricky. Considering your symptoms and the stored error, the exhaust flap is still a strong possibility. Given the relatively low repair cost you anticipate, I would advise taking it to a workshop for a professional diagnosis. They can properly assess all exhaust components and confirm the source of the exhaust noise. It is better to be safe than sorry.

I appreciate your advice. I will schedule an appointment with a workshop to have the exhaust flaps and related components inspected. They confirmed it was indeed a defective exhaust flap, as suspected. The repair cost was almost exactly what I expected, so thank you for your insight.