Welcome Paul!
I would like to hand you some initial advice and cheering:
¤ Valves need adjusting
- Easily done unless the adjustment bolts are stuck. 17 mm crowfoot wrench.
¤ Front suspension drops after a couple of days. Do I just need to replace the front bags, or all??
- Leave them for now! In time You'll learn how to troubleshoot the air suspension.
- A common cause of leakage is the level valves, rather difficult to overhaul.
¤ I didn't see any alcohol in the pot (can someone clarify if I need to do this asap and what this procedure is)
- I assume You refer to the anti-freeze unit at the air inlet to compressor.
- If You intend to drive in the winter you need to add some spirit in there.
¤ I haven't started to look at the bushings around the car, but suspect I will have a long list. Where do I start? Front/ rear? subframes, engine.... etc...
- Start by looking for movements in bearings and bushings. Are they tight?
- Don't forget to grease all of the lubrication points in front axle and rear.
Regards from Ingvar in Sweden (15 years marriage with my dear 6.3)
109.018.12 1968 Bronze Braun (M100 in good shape)
126.039.1A 1988 Dunkelblau (M117 so a bit slower)
+ A few other MBs used for daily transport