Welcome to the forum! Most of your issues are dealt with in the W220 S-Class Encyclopedia sticky (in the blue-backgrounded area at the top of the page). To help you with terms, for the suspension look for ABC and "Both;" for the doors look for "soft close" and "PSE pump;" for the windows look first for the fuse charts link under Electrical System; and the seat pulse is also probably related to the PSE pump.

There is a lot of reading to do; look it over - I'm sure you will have questions, and there is a lot of help here - but those references will give you a start.

 

For abc it's likely a valve block but maybe just a abc fluid flush will unstick the valves
For seat massage they were never very strong or good

 

yes, you need your valve blocks rebuilt. I am in Houston and rebuild them regularly. PM me if you are interested. Its a lot cheaper than buying new ones.

 

Thanks, I'll try the flush. I saw where you can get a special tool to male it easy.

 

There's no special tool for the flush, just a longer hose to drain the return line into a waste bucket as you keep filling the reservoir with fresh fluid. There is a special tool on newer cars though. A flush has to be done with the rodeo function in STAR diagnostics. You can do all this and you should anyway. Also there is a drain for each strut. They should be individually drained each time the car is on the rack since that's the one part of the hydraulics that doesn't get flushed at all. Not much comes out but it will be black.
If none of this fixeds your sagging suspension PM and I can help.

 

Thanks for your response, I read somewhere that driving the car could be the closest I could do as far as a rodeo. Also understand that Pentosin chs 11f is the fluid to use. AGA has a tool to make it easier.

 

Yeah, maybe but you can't flush the fluid while your driving it

 

What do you suggest I do? Can you do it for me? If so where can I bring it, I'm in Atascocita by Kingwood and what would it cost?

 

Using the up/down button in the dash is similar to Rodeo

You just have to do it dozens of times

 

Or find a Star diagnostic system.