ATF 236.17 Automatic Transmission Fluid

236.17 is Mercedes-Benz's specification for the 9G-Tronic 9-speed automatic transmission, a fluid chemistry distinct from the older 236.15/236.14 specs used in earlier MB automatics. MANNOL 8221 is formulated to this exact specification, which matters because 9G-Tronic units are more sensitive to friction-modifier mismatch than older 5- and 7-speed MB gearboxes — incorrect fluid can trigger harsh downshifts or gearbox fault codes. Before ordering, confirm your model is fitted with the 9G-Tronic (check the transmission code in your service documentation, since 236.17 is not interchangeable with 236.15). This product is manufactured in Germany and imported as genuine stock, giving the batch consistency that a precision fluid spec like this needs.