Touareg: 2006 V8
Join Date: Sep 2006
Location: Wytheville VA USA
Second Vehicle: 2004 V6
Thanked 319 Times in 279 Posts
That valve adjust the dampening rate of the shock. That part is separate from the actual (pneumatic) "air spring" part of the system.
The air spring is what adjusts the ride height. You have a dial to select this.
The valve is what adjusts the sport - normal - comfort settings. You have a roll button to select this.
You could have a system that did just the air height, a system that just did the comfort modes, or a system that does both.
The touareg has a system that does both, but they are actually two separate systems that work together.