For the design of elastomeric bearings, it is necessary to understand the deformation states that result from operating loads. In terms of the Digitalization of the vehicle development process , the aim and challenge of the research work presented here is to determine these deformation processes in the form of physical-mathematical models and to make them usable for development-relevant simulations. In already published investigations within the context of the 46th conference of "DVM Arbeitskreis Betriebsfestigkeit" it could be shown that the current standard characterization of elastomeric bearings by means of static and dynamic stiffness as well as loss angle is only conditionally suitable for developing and parameterizing exact models for virtual load data determination. During the investigations described here, test rig measurements of selected complex engine mounts beyond the range of standard characterization are presented. The influence of multi-axial deformations on the quasi-static deformation behaviour is investigated in detail. The determined physical effects are represented in a new modelling method. The focus on modelling is set on the range of operating strength, since the model is to be used primarily for the determination of operating load signals with the help of multi-body simulation. The parameter identification is done by optimization algorithms based on complex multi-axial stochastic signals. Using real multi-axial operating load signals, a significant improvement in the representation quality of measured load signals in comparison to standard models could be demonstrated for the newly developed modelling approach. The simulation error and the signal damage are considered as evaluation criteria on the basis of a standard fatigue strength evaluation. Different types of elastomeric and hydromounts were investigated for the validation.