Engine Smell when Sunroof Open - Mercedes CLA Forum
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post #1 of 1 Old 11-21-2018, 08:31 PM Thread Starter
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Engine Smell when Sunroof Open

Hi All, so whenever I drive over 60kmh and my sunroof is fully open I can smell a unique engine/gas/exhaust like smell ...

I have monitored it for a while and have determined that it doesnt start to smell until I am driving fast and continuous

It doesnt matter if the car is on C or S mode but the sunroof must be open. The smell is definately not coming from the air vents

its a very unique smell something like an engine gas odour ... Has anyone else noticed this??!! I am quite baffled...

I have replaced the car's stock air filter with a K&N filter and also the stock cabin filter with RYCO ... no difference, the smell is still there when i am driving on the highway at around 100kmph ...
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