I want to replace the rear diff. in my 1984 300d, it is wining and I like to take this opportunity to change it and lower the ratio for better mpg and alittle less noise at highway speed. I talked to the local mb dealer to see what my options are. They say I currently have 3.06 gears and that I have to order a ring and pinion for a 1985 which would turn out to be 2.88 ratio.
My problem is, my shop manual says I have 3.46 ratio and and it says the same thing for the 1985. Who or what is right. I took these #'s off my rear end this afternoon. can anybody tell which ratio I have with these #'s
115 351 32 08

3826

6N 84

+6f+m
any help would be appreciated