I have one in my audi...(more info)
Be careful when they say OBD or OBD2.
So many car uses OBD interface (like USB in your pc).
It is 'universal' but not completely universal. Meaning: some functions are OBD2 standard, but some important features can only be accessed by special tools proprietary to the car.
Hence, to acess the FULL FUNCTIONALITIES of let say the OBD of an Audi (like my car), i still need to use a special obd tools and obd software.
In audi (and VW world), we call them the VAG tools.
I have a set. Basically, it consist of an interface and a software.
The software can be instaled on a pda or a laptop.
The laptop's one have more functionality.
Yes, it can do all sort of things.
Like throtle body adaptations, ecu learning, engine rpm plots real time, reset maintenance lights, test all sensors etc etc.
Try to see here:
Ross tech engine tools
Being said that, dont fall for a "generic" obd tools marketing ploy.
You may bought it, but no necessarily it will do ALL things.
Of course, one day, someone will come out with an OBD tools that is dedicated to access every Murano functions. Buy this one, dont fall for generic ones.
Hope this helps...