HP Tuners Europe on Instagram: "RTD Gen 4 is the latest dealer tool allowing you to work with your favourite tuner from anywhere in the world to develop a custom tune for your vehicle 🔧 This is a quick start up guide that shows you the first things you need to do when you get your RTD, including sending your vehicles information to your tuner, receiving a tune file back from them and flashing it into your vehicle. The best thing? You can repeat this process as many times as you need, to get a t