The only scanning tool you need for Etec is EvDiags software, a computer, and the cable.
The EvDiags is available at any dealer, OR you can buy off the internet bootleg copies. It works just as well.
The software will come with a cable. You supply the PC.
There are numerous ppl selling bootleg, I have purchased from a guy in Monaco successfully.
Don't kid yourself. Software will not FIX these engines. It may point to the likely issue, but it MAY NOT. I have run into lots of problems that do not show up on the EvDiags diagnostic screens. Bad injectors, bad HP fuel pump, basically anything that does not set a code...and you are on your own.