Mines is a late 2007 golf and by opening the little compartment underneath the light switch to the right of the steering wheel and taking it out , then if you clip out bracket that's right infront of you then look up and to the back you may see something with a red connection. If you can get your hand up there , clip it out and turn it round you should be able to read the part number. It does help that I have skinny hands though!