Firstly ....Bob I dont see what special tool you would need to remove this item. You just remove the rocker, using a large screwdriver, then use a socket set to remove whatever you need to replace !
Erick, I consulted the Haynes last night but there are no dimensions, just a photo of the tool. I tried scanning it but its poor quality black and white to begin with and didn't work out well !
Sorry !
I will try to draw it if I get the chance later !
Regards,
Ben in Ireland.
'64 230SL 4sp.