I have a '91 420SEL with a green transmission modulator valve.
I have not removed it but I have cleaned it very well and can find no part number.
I ordered one through EPC for my VIN and it is black (126 270 91 79).
On the Mercedes-Source web site they mention that this black unit is an improved part over the older original unit.
What I am concerned about is that they are usually color coded for a very good reason and of course I am no longer green if I use this one and frankly don't know enough to know what is correct.
I know how to remove it but can not find the reference for setting up the new unit whether I acquire another green one or use this new black one.
According to the data card I have a 722.355 automatic but I do not find a number on my tranny to verify this.
I am the 3rd owner so there is no solid way to know if this is the original tranny or not.
jimm1009 here or jimm1009@yahoo.com
E-mail would probably be better as I am relatively new to this forum.