Electro-mechanical height adjustment suspension system is a promising automotive technology. It works on the ground clearance of the vehicle, reducing the aerodynamic drag with not negligible benefits in terms of fuel consumption and CO2 emissions; besides these advantages, it improves also the versatility in the use of the vehicle. The present work examines in a systematic way the state of art of the existing solutions, summarizing the main feature, the working principle and the architetures, with particular attention to the electro-mechanical systems, which represent the best compromise between functionality, high reliability and low costs. The aim of this master thesis is the modeling and the design of a reversible eccentric electro-mechanical height adjustment system for a multi-link suspension (Alfa Romeo Stelvio rear suspension), that permits to obtain the best results with references to the power consumption and actuation speed.