4MATIC permanent all-wheel drive is standard in models R 350 CDI, R350 BlueTEC, R 350 and R 500. It provides valuable support when negotiating difficult road surfaces. Drive torque is distributed to the front and rear axles at a ratio of 50:50. In conjunction with the Electronic Traction System 4ETS and Electronic Stability Program ESPĀ®, 4MATIC improves tyre grip and traction. Particularly on unstable roads, wet surfaces, snow and ice, AWD boosts road adhesion and enhances safety.