Installing a 722.409 from a 190E 2.6 into a 300E 2.6, what to replace?
 

I have a 722.409 from a 190E 2.6 that I am selling to a guy who will have it installed in his 300E 2.6 which also has the 722.409. What should he replace?

I know he should replace the filter and pan gasket, dip stick tube o-ring, vacuum line going to it, and the transmission cooler lines, but what else? I remember the reading about a spring kit to install, what is that?

Nothing I can think of. Everything sounds fine that you have thought of.

The valve body spring kit just enables first gear start on the transmission. Most guys put it in when they get the 2-3 flare and it's just a simple bandaid at that point. I think the 1993 models already had first gear start anyway, so it would be pointless. In the case I am wrong though, it does make the car a little quicker from a stand still under hard acceleration with first gear enabled. It would be harmless to install, but an extra expense that isn't 100% necessary.