Nowadays people are increasingly sharing, collaborating and exchanging things. For example, AirBnB and Zipcar have been growing since the past five years. The economic recession and the rise of sustainable solutions are causes for this trend. Especially, car-sharing has been growing ever due to the legislative, and cultural emphasis on green and sustainable transport. Service Innovation Team in a German car company sees the opportunities of sharing mobility and is eager to know what are possible car-sharing services in urban area in 2020. Therefore, in 2012 Service Innovation Team in the company initiated MyCar project to tackle down this challenge. Based on MyCar project, the project “Socially Smart Mobility” (SSM) sees social engagement between people as a way to enhance ca-shairng experience and poses this questions: “How can shared mobility serve as a social platform where people engage and share information, which further provides a smart and flexible mobility solution for end users?” Particularly by mapping “social engagement” onto “car-sharing”, factors that contribute to “car personality” is discovered. This graduation project is defined as a design project. The focus is to realize the current development of MyCar project, find common ground between MyCar and Socially Smart Mobility, find insights in literature as well as user research, generate concepts based on these insights, embody a concept into interactive prototypes, validate the concept with target users, get valuable feedback and provide suggestions and recommendations for future development for the company. The main research question is: How can social engagement enhance the shared-car using experience? Based on the persona in MyCar project, two potential target groups: experiential drivers and eco pursuer are merged. Also future context is pinpointed out based on MyCar project’s identified future trends. Potential target groups and future context serve as a starting point for SSM project. Insights for future content is that there are more and more connected objects, ubiquitous computing are everywhere including the in-car environment and people combines different mobility modes in one trip to travel within the city. Experiential drivers are groups of people who not only focus on using mobility solutions but are open to new experience while driving. On the other hand, insights from literature shows that there is a growing trend in sharing economy and specifically car-sharing has been receiving attentions over the years. Two crucial insights for achieving successful sharing business model in terms of social aspect are: 1. people believe in sharing and 2. people trust strangers. An in depth interview is conducted with ten participants based on insights from literature research and MyCar project. By utilizing the methods of “culture probe”, “focus groups” and “contextual interview”, user’s latent needs are elicited. After the research phase, general findings and four user profiles were identified and discovered in terms of being socialized and using car-sharing. Two profiles: “social seeker” and “goal achiever” are selected and used in the idea generation phase, which aims at tackling down the design challenge: How can we help different types of people achieve their social interests by providing relevant and innovative car-sharing services? In the end, the final concept is developed. The concept is called “SoundDrive”. SoundDrive is a “token” concept that is embodied on a mobile app. SoundDrive possesses music data thorough online music platform, SoundCloud specifically, which users can carry to the shared car. Once the user gets into the car, SoundDrive right away communicates with the car’s infotainment system, logging in the driver’s online music platform. Along with the trip, music data is accumulated and shared on the social platform. After arriving home, driver can check the music history again and being able to connect to other drivers who use the same car on social platform. See figure 0.1 the using scenario of SoundDrive. After developing the prototypes, user testing is conducted. The goal of the testing is to see if the concept is align to the design goal: How can we help different types of people achieve their social interests by providing relevant and innovative car-sharing services?, and answer the initial research question: How can social engagement enhance the shared-car using experience? Seven people joined the user testing sessions and feedback and insights are obtained. In the end people are willing to use SoundDrive in the future and to see how network effect can be achieved by this service. However, they cannot foresee that the shared car possesses a personality which can enhance their car-sharing experience. Future recommendations were drawn: 1. the company can team up with SoundCloud to continue on this project. 2. Transferring the mobile app concept to the application on infotainment system. 3. Further researching on in-car social music recommendation system.