Mercedes Benz GL-Class Air Intakes Want to get added performance from your GL-Class Mercedes? A great way to do that is by adding a high performance air intake system. A air intake system increases the volume of colder, denser air into your vehicle's engine. This, in turn, causes your vehicle to perform better and get more horsepower. Our air intake systems feature lifetime construction, a complete installation manual, clamps, hoses, and polished aluminum piping to complete your installation. Adding a air intake system is one of the easiest and best ways of gaining more horsepower!