The stuff I get is in a blue bottle (Supertech) and says "for use in vehicles previously serviced by Dextron 111 and Mercon". My guy is originally from Serbia and is very practicle. He even tells me to use it in the fuel once and a while to clean the injectors. Apparently it is strongly detergent. Also fills the fuel filters with it when it put them in. That way you don't have to hunt around for diesel and the tranny fluid runs right to the injectors and cleans em up. The expensive stuff might be good but Benz engines use oil intentionally. Who wants to be adding Mobil 1 or such? Like they say, a fool and his money...