Mercedes-Benz BlueTEC is a system of advanced clean-diesel innovations that work to reduce vehicle emissions on diesel engines while also improving performance and fuel economy. BlueTEC technology consists of a proprietary liquid solution called AdBlue, which is stored in the spare wheel recess, injected into the exhaust stream, and down the line, it converts harmful nitrogen oxide to nitrogen and oxygen. BlueTEC technology includes the following features:

• High-pressure fuel injection system: A state-of-the-art, high-pressure fuel injection system that delivers fuel to the engine with greater precision and efficiency.

• Variable-vane turbocharger: A variable-vane turbocharger that provides more complete combustion and better fuel economy.

• Selective Catalytic Reduction (SCR): A system that uses AdBlue to reduce nitrogen oxide emissions by up to 90 percent.

BlueTEC technology was first introduced in 2006 in the Mercedes E-Class and GL-Class, and it quickly gained popularity due to its ability to meet stricter emissions laws and improve fuel economy.