Hi. First of all if you mentioned that you have a multimedia that means your unit should already be android system and I am assuming all this based on a Ford Fiesta. That being the case, the first thing you need to do is buy an obd2 or elm327 adapter that is either bluetooth or wireless capable (you need to find one that is flat as in it will fit into your obd car plug and you can open and close the coin box with no problem). Next is you need to get any app that can read and display the obd stats, one of the more popular ones would be torque lite (free) or torque pro (pay), and download and install this into your multimedia. Once that is done, plug in the adapter and then connect it to your unit and when connected just go to the settings and you will see a bunch of menus. Or you can just keep pressing the display and it will probably ask for NEW DISPLAY and then ask you what you want displayed. You can move it around, play with the size, the type of display etc. It all depends on what you want. All is easy once you have connected the adapter and your multimedia. FYI, you might want to get the obd2 adapter that is auto off or it might always be on and as small as the current draw is, I would prefer the one with the auto off. Those auto offs are around US$ 10 at aliexpress or you can definietly just get anything that is around US$ 3 for a regular unit. Good luck!!!
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