There is a thread here somewhere about 2nd row removal. In the US, IIRC, the issue is the airbags. To solve the problem you have to make the ecu believe the seats containing airbags are still there. To do that you use a diode, like what you'd see on a circuit board. You connect one wire of the diode to one side of the airbag plug and the other wire to the other side. Not sure what exact watt and ohm diode you need.
If you search the forum you'll find the thread with the answer. Those diodes should be cheap and readily available either at a electronics supply or repair shop, or via the internet.