Follow instructions for application of heating grid to rear window, the easy part. Wiring it up takes more effort. Remove both parts of the rear seat and discover (I hope) a black wire with red tracer which goes nowhere. This wire should be hot when the blower switch is pulled outwards. Use a test light to determine this. Fuse the circuit with a 16 amp fuse -- the fuse-box may or may not have a fuse on this circuit. Ground the window by means of a sheet metal screw put underneath the padding on the roof pillar. Tuck the wires in under the edge of the rear window gasket and you have a neat installation.