W251 R320 CDI suspension info

[ashedd]

Does anyone know how the air suspension on a 2008 R320 CDI 4-matic 7G-tronic work, and can you explain it to me? I find surprisingly little info about it online.

I know I have air suspension, when I hook up a heavy trailer I can see the rear raise itself, and it does it much faster than a w124 or w123. Likely hydraulic vs electric I guess.

I've read about air bags in the rear only, and air bags in both front and rear. I have no idea which I have. I live in a condo now and can't just go look. I've also read about people being able to raise and lower the suspension at will, like 6.3/6.9?? And that it lowers itself on the highway. This behemoth actually rides like glass on the highway.

My issues is it seems like I need "struts", but I dunno where to start. I know some R-class' come with standard struts. Other than the needing struts, it's very tight in the front end.

Oh, I have a C/S suspension button too. The S(sport I guess) mode is noticeably tighter and I usually use it on the highway so it doesn't float so much.

Any idears?