Vehicles with semi-active air suspension or Airmatic have several issues to be concerned with. Compressor failure is often attributed to increased air demand due to leaks or from a faulty relay causing the compressor to run on and overpressure. Leaks are common at the front Airmatic struts on the W220 chassis S-class. A repair kit is available to retrofit these struts and repair the leak without strut removal. Although less common, for other leaks the strut must be replaced. A new strut is always the best solution but aftermarket remanufactured OE air struts are available in many cases at half the cost of new units. Call us if you are having suspension problems or have questions.