Why does my Mercedes C-Class have a rotten egg smell from the exhaust?

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Why does my Mercedes C-Class have a rotten egg smell from the exhaust?

A rotten egg o r sulfur-like smell coming from the exhaust is often a sign of a failing o r overheating catalytic converter. This happens when unburnt fuel enters the exhaust system, commonly due to poor combustion, rich fuel mixture, o r faulty spark plugs/injectors—which are common in Pakistani conditions where maintenance is sometimes delayed. The catalytic converter reacts with the excess fuel, creating that distinct odor.

Talha Kyanii asked on 10 Oct 2025 18:15:23 pm

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Why does my Mercedes C-Class have a rotten egg smell from the exhaust?

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