I have done all of these to my 92 400E by myself.
Without a hoist, I had to jack up my car using a hydraulic jack, I can do all these in 2 hours. Replacing all 8 spark plugs on my 400E took me another hour.
For a pro with professional equipment, he may cut the time in half.
Go with Mobil-1, I have Mobil-1 in all of my cars, I used Mobil-1 engine oil and ATF as well. I put in Mobil-1 when my 400E was 9 year old with 200K km, it doesn't leak at all.
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.