This study explored how additional auditory feedback in the interior of e-cars can convey vehicle-related information and influence driving behavior, with a focus on promoting economical driving. In an initial online test, seven sounds were integrated into a short video and assessed for emotional impact, sound perception, and information clarity. Based on the results, the sounds were refined and interactively tested in a modified game serving as a driving simulator. The study found a preference for static and harmonic sounds and showed influences on driving behavior through interactive sound.