U16 Exhaust system with acoustic flap
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Article here.
How Does It Work?
Mercedes-Benz flap technology works in conjunction with DYNAMIC SELECT Driving Modes. When a mode is selected, the exhaust flaps, located inside the exhaust near the rear bumper, allow more or less air through the exhaust piping. By allowing more air through, the engine will sound more aggressive and can possibly add a little bit of power, sacrificing efficiency and noise reduction.
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Aman2000 (09-06-2019)