OBD 2 software/hardware???

I want to make some changes in the configuration of my car, like the panorama sunroof, electric seats, etc...
I know there is some software/hardware to do that, but what to choose?
any tips?
If you just want to reset your CEL or look at sensors then I use the software from obd-2.com , it's about $150 and works well. Not all software works with MB's so ask before you buy or get a moneyback guarantee.


