Safety-critical in-cabin sensing applications such as driver monitoring or child presence detection, but also convenience features, like gesture control, greatly benefit from dedicated sensors such as interior cameras with RGB and near-infrared capabilities or depth sensors like time-of-flight cameras. Modern millimeter-wave radars, which are traditionally used as exterior sensors for autonomous driving, are also quickly gaining popularity in the interior space due to their low cost and power consumption. They are even accurate enough to detect vital signals, including breathing and heart rate. On the other hand, participants stressed, that it should be possible to leverage the existing sensors in the cabin for new use cases with machine learning and sensor fusion, including microphones, steering wheel and seat occupancy sensors.