The radiator fan comes out reasonably easily - two tabs up the top which need to come out and some electrical connections one on each side.

There are 3 clips that hold two hoses running along the bottom of the radiator fan on the engine side which you need to clip them out and move the hoses away from them then the fan will slide straight up. Once you've got it out you'll have plenty of space to do the rest.

When putting the radiator fan back in make sure you push it hard against the radiator as you're letting it fall down as there are little tabs that need to slot in.

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2004 E53 4.4L N62