The original order was based on my registration so I would have thought that the product delivered would have been matched to the model of the car and would have worked (plug and play) and would not have cost me several calls 0844 to attempt resolving a problem. The problem was initially diagnosed as car polarity which did not work requiring the dispatch of a new harness which resolved the problem. I then had at my own cost to send back the initial harness(s). So all in all despite the persons on the telephone being very pleasant and helpful, by getting it right in the first place would have avoided me a lot of hassle and additional cost.