If you think there is not free-hand-enough when you come to scan the Mercedes car with the original Actia tablet PC from Mercedes, then, you can use the Star Diagnosis to replace the Actia tablet PC where can allow the technician to be more free hand during operating the equipments. Adapter for connecting the Actia Caesar D2 or D3 Multiplexer directly to a Laptop or Desktop PC with RS232 (comport) instead to the original Actia tablet PC which is already outdated and have a very low performance compared with actual Desktop or Laptop models. When use such device, there are not needed to install any extra software, no need to add any add-on modules, no need to add any extra parts or accessories. And which is even not needed any training for operating it, any car repairing technician can do it well. Such product was from my browsing via ebay to get it. Where I often share with my friend it needs to browse ebay while free, it would often get surprise from many home-make products!