MB 236.81

Approval MB 236.81 is a Mercedes‑Benz technical requirement for automatic transmission fluids that defines a high viscosity index, shear stability, excellent protection against oxidation and wear, as well as optimized friction characteristics for smooth gear shifts and long‑term operation of hydraulic systems. It is intended for Mercedes‑Benz passenger and commercial vehicles equipped with 7‑speed 7G‑Tronic, 9‑speed 9G‑Tronic, DCT and other modern automatic gearboxes, including models with electronic control and torque converters. A fluid that meets MB 236.81 provides compatibility with all seals and friction elements packaged in the system, prevents foam formation and maintains operational stability at high temperatures. Although the specification does not address the DPF or catalyst system, it guarantees that the transmission will operate without unnecessary energy loss and with minimal wear, extending the vehicle’s service life.