>Could you (Benzmac)please explain the operation of this system or direct me to the
>appropriate service bulletin or book? Specifically, how does the position
>of the actuating valve lever relate to ride height? What happens if the
>lever travel exceeds the limits and what are the limits (e.g. 8:00-10:00) ?
>What happens if the lever is at 7:00? What is the correct neutral
position?
>
>My car has a high ride height and if I adjust the link to reduce the height
>the ride becomes very harsh and a loud "thunk" occurs over sharp bumps.
>
>Any help will be appreciated. Thanks, Lou

I will have to do some research myself to answer your question. This system is meant to help keep the car level at all times. Not to work as a lowering or raising kit.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

As Benzmac said the system is designed to compensate for extra weight in the car. In a new vehicle without anything in the car the system should be at rest. As time & mileage goes by & the springs start to sag the system has to work more. If you can lower your car by moving the valve, then the springs are sagging. This can be good or bad depending what you are looking for.