A Brief guide on how to install the Passat W8 Interior light into a Mk4 Ibiza: Please note, i originally used this guide, however i hereby make a few ammendments for Mk4 Ibiza owners: http://homepage.ntlworld.com/dgace/w8_inner_light.htm Firstly, the dimmer wire needs to be attached to the following wire behind your headlight switch. When spliced, run the wire up the a-pillar and through the front of the head lining towards the Interior Light socket. Note - when liooking at the back of the plug, it is top right wire (blue/light blue) The interior light has a rear facing female plug connector. This will foul on the alarm sensors. I do not know if it will fit if they are not present on non-alarmed cars however. I simply pulled off the connector with some pliers (it was getting dark and i was rushing!) Chop off the male connector attached to the car so the three wires are exposed (Brown, Brown/Black, Red). Solder/attach some wire extensions onto them to give some soldering room. The wires are connected to the W8 as follows (please excuse the mess!) Holding the W8 so that the connector is at the top, and the top pin number 1: 1: --- 2: Red 3: Brown 4: Brown/Black 5: --- 6: Wire from Dimmer When finished, secure the joints with insulation tape and insert the W8 light into the gap, rear end first, followed by pushing up the front. It will click into the roof and your all done! Dont forget to install 4x 501 bulbs in either! I opted for 2x White LED's for the map lights and 2x UV led's for a nice blue/purple glow Please excuse the quality of the photos, i fitted this ages ago now and someones request has just prompted me to do this little guide... Good luck!