Buy Vadis Software -

You can still find VADIS kits that include the necessary cables and interface from retailers like European Transmissions and Parts [ 1.2.4 ].

Software alone won't talk to your car. You will almost certainly need a unit. This is the hardware interface that plugs into your car’s OBDII port and connects to your laptop via USB [1.2.1, 1.2.7 ]. 4. Installation Tips

Since Volvo has moved on from VADIS, finding it usually requires checking specialty shops or enthusiast communities: