The use of driving simulators is part of RENAULT's approach for eco-driving development. The geDRIVER project objectives were to: develop ECO mode for all, taking into account eco-driving criteria; develop a training business offer and develop specific assistance HMI (Human Machine Interface). In terms of driving simulation, this induced a need to develop a wide range deployment training tools integrating multisensorial feedback, enhanced gameplay for scenario design, and driving analysis tool into ECO² simulator. Several experiments were carried out, in order to evaluate validity of simulation for an eco-driving training purpose. Results show that visual indicators is the most appropriate and that the eco-driving rule "gear up at 2500 rpm" is the most efficient. At last, the simulator appears to be an efficient tool, to understand and integrate eco-driving rules, and to improve economies in terms of CO2 emissions.