I can add that it was a PITA to fit the cold-climate version CCV on my M54 engine. intake manifold had to come off but it was a good opportunity to clean everything up a bit. good luck if it's supposed to be trickier with the N52!
Later N52 has it integrated, earlier do not. I took the manifold off and did the starter at the same time. Not a difficult job just fiddly with all the small wiring connectors.