Well just to add to this thread. The Wade Performance intake is a Warm Air Intake. Both Cold Air and Warm Air Intakes have there advantages. The Warm air intake will tend to have its power at the top end as the cold air intake is across the power curve. Sure the air box in the car can flow more air than the engine can suck into it but thats not what makes the power. The efficiency of the intake to get air in the engine is what makes power. The stock air box creates lots of turbulence. This turbulence reduces the amount of air entering the engine. With out turbulence the velocity of the air is increased allowing more air into the engine. And another thing sure Mercedes creates the air intake as efficient as they can but remember that they have to deal with parameters. Mercedes has to add resonators in there intakes to cut the sound down so it will pass a decibel test that the government enforces. This decreases the efficiency and the velocity of the intake. The perfect intake is one that has as little bends and is as smooth as possible to reduce turbulence. The Wade performance intake might create more power, but it is a sure fact that it will increase the sound of the engine. Diesel and gas engines act differently, gas can use the extra the air to create more power. But the Diesel engine will need an increased air and fuel ratio to create more power. If anything my predictions are that this intake will increase gas mileage though.