Transmission upgrade?
 

I want to find out if I can make the following changes to my 93' 500E:

Make 4-sp. auto transmission start with 1st. gear, instead of second. But I don't want to have jolting starts from stop, so what can I do to make all 4 speeds into higher ratios. Is it changing the final drive ratio?

I've found Renntech, has kits to make auto-transmission start from 1st. gear, but I don't how to reduce the jolting start up effect. Moreover, it would be nice to make the 4th gear taller to have lower freeway driving engine speed.

Thanks!

Henry