Let me check with a Mercedes dealership. I think they can source a pigtail connector.

 

Just to let everyone know... I've found a harness for him, thanks to a generous member that cut his and tossed it when he switched to the CM30.
Shipped and on the way. As far as the inlet and outlet sizes are concerned, I don't know what to tell him. I do not believe that it's going to cause issues if he switches to the updated pump, he'll just have to ensure that everything is sealed and seated properly. Does that mean he needs to get a different hose or figure out how to seal it properly because of the different inlet and outlet sizes, probably... If this is done correctly then there should be no cause for concern...

 

Many thanks for the help. You guys are awesome!!!