As I'm hearing from some mercedes mechanics they choose Mopar atf + 4 transmission fluid over mercedes brands. Does anyone have any insight on this? Mopar is a Jeep & Chysler atf but again some mercedes mechanics believe this is a better transmission fluid than the mercedes brands. I have an 02 S55 AMG & I keep up ton the maintenance I but want to put the best fluids in it to hopefully keep it running well and get the best out of it.