In this thesis the design of mechatronic vehicle-suspension systems is described, using the exampleof an off-road utility vehicle. The presented approach is based on the development process formechatronic products. It is extended by transferring the model-based approach into the designsteps of planning and conception.First, an overview of the state of the art in mechatronic vehicle-suspension systems is given byexamples. The focus is on the functional structure which is used again in the conception. Then therequirements and design objectives for designing the mechatronic vehicle-suspension system andthe corresponding evaluation criteria will be defined. Both the requirements and the design objectivesas well as the evaluation criteria are represented in corresponding models. These models arepart of the model-based design environment. In the following, during the concept phase, the existingpassive vehicle suspension system will be analysed at first. Afterwards the functional structureof the new mechatronic vehicle-suspension system will be developed and the appropriate principleswill be selected. Finally, the development of the structure, the detailing of the suspension andthe actuator concept, as well as the synthesis of the desired dynamics will be performed. All thesteps of the concept phase are done in a model-based way. After the concept phase, the modelbaseddesign of the mechatronic vehicle suspension system will be effected. In addition to the actuatorsfor the active intervention the components for the used semi-active hydro-pneumatic suspensionwill be designed. To round off the thesis the initial start-up and testing of the components ofthe mechatronic vehicle-suspension system on a test bench will be described.