Well it depends. The 300D and TD made in 87 both have 2.65 ratio. The 300E sedan has a 3.07 til 1989 when it changed to 2.87. The 300TE had 3.27 up till 90 when it also changed to a 2.87. So after 90 both sedan and wagon have 2.87. The E320 sedan and wagon have a 2.65 ratio.
Bosch Master, ASE Master, L1
33 years MB technician