Introduction
This is a guide to replacing the air intake hose on the M271 Evo 1.8L Turbo engine used in the 2012 Mercedes Benz C250 (W204). Damage to the hose can result in inconsistent air usage of the engine and potentially damage other parts of the engine. Luckily replacing this part is incredibly easy and requires no tools!
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Find the bonnet latch inside the cabin and pull to release the bonnet (typically in the driver/passenger footwell).
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Reach under the bonnet to find the second lever that fully opens the bonnet, giving access to the engine bay.
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On the M271 Evo 1.8l Turbo engine, the air intake hose is on the right side of the engine bay
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Find the plastic end of the intake hose and firmly pull until released
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Find the plastic latch holding the scoop of the intake hose
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Using a pry tool or similar, press down on the latch until it releases the scoop
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Firmly pull the scoop away from the plastic housing and remove the old hose from the engine bay. You may need to rotate the scoop to unhook a latch on the underside of the plastic housing.
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To reassemble your device, follow these instructions in reverse order.
