hi, i have a 2004 cl600 and am trying to find the best differential fluid to use mercedes recomends 85w-90w. i've read recomendations for mobil 1 75w-90w. what do you guys recomend?
thanks

Hi,the short answer is I dont know, but I would consider mobils hd 80-90 also many oils are adjusted for limited slip app which you dont need, mobil has a help line which I would use. Otherwise best to follow MBs recommended spec assuming your use is "general".