Wow... I thought it was much more difficult
Thank you very much!
I've ordered MC33290 from eBay. Here's the link:
1 pcs MC33290 SOP-8 33290 IC New | eBay
I haven't ordered the Arduino yet. I think I'll choose this one:
Arduino Nano V3.0 With ATMEGA328P Robotics Media Module | eBay
What do you think? Will this do the same as a Duemilanove or an Uno board?
I decided not to buy an OBD plug - I will solder the cables from the Arduino directly in the terminals of the OBD plug (behind).