Somebody here was interested in a manual how to install headrest monitors to your 166. Well you dont need a manual it's pretty simple. First you remove your old headrests and install the new ones. With the new headrests there will be each set of wiring which needs to be connected to the dvd through one common double cable (A jack for each monitor) that will contain within himself the power supply and the video signal. The wiring of each monitors need to move through the seat and goes underneath it. From there you have to connect the monitor wires with the special double cable. ( one for the video signal and one for the power supply) All this wiring will have to go underneath the rug and run through the ICS and into the back of your DVD player or wherever you keep your DVD. From there the cable divides into 2 different jacks. The power supply jack will go to the power supply ofcourse and the video jack will go into the video out. So basically that's all to it.