H&R springs 4 formatics
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on coilovers, spring adjusts height of the car and shock adjusts ride quality(damping).
usually for coilovers, there is little knob on top of the shock which is used for manually adjusting damping force. from soft setting to stiff.
from 09 w204 (for US and Canada), agility control is there (not sure whether it is std or opt) which adjusts damping of each shocks electronically depending on how it is driven.







