Just for your reference, it took me 1 day stop and go to rebuild the PS pump on my 400E, man, the V8 engine bay is tight! you I6 may be easier.

Your procedure sounds fine, according to my memory, it is pretty straight forward, I spent most of time removing PS pump from the car, access to those 13mm bolts is a nightmare for 400/500E.

You may want to siphon the PS fluid first before you disconnect any hose, don't mess up with the direction of the internal components: fins, valves and etc... the fins have direction, round side faces out, keep inside absolutely clean, i rinsed the internal parts with PS fluid before I put them together.

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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.