Hope this helps .
In a 16-bolt 280SL (113) automatic trans, there are a couple of versions. K4A025 designates an earlier model. K4A025 designates the later stlye. MB number# 113-270-0901. If all else fails is the tag on the left side of the trans there? Hope that this helps in any way.
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
2000 BMW 528I (WIFEY'S CAR)
"Excuses are crutches for the unfounded."