hiya i did at first find it daunting but just took my time, the unit should come with another short lead that plugs into the existing loom , i also bought a small autologic lead with a small box that plugged in and allowed me to use my steering wheel controls the hardest thing i founf was undoing the large black connector plug as it there is a top bit that slides off before you can pul the plugs apart. the other thing i had to get was an aerial conversion plug as the other one didnt fit went to halfords for that hope that may help please give me a shout if i can help you any more gary