I have just purchased a Ford Fiesta ST, which I was pleased to find as the model is being phased out and the specific car and options combination may be hard to source in the run out period. On collecting the vehicle I discovered that it had been Diamondbrite treated at a cost of almost £300 despite no overt mention of this cost in the sales process (which was very amicable). The cost of that additional item was itemised in the sales order, which I signed electronically and did not scroll through as I had already rejected all dealer supplied insurances, and Diamondbrite is clearly mentioned in the list of ‘Other products that are available to you’ but not selected for purchase. I am waiting for a reply. Additionally, one of the B&O speakers (an option) seems to have a distinct bass buzz/rattle, which I will report to the dealer today. What would you advise I do with regard to the Diamondbrite ‘mis-sell’ please? And if the dealer is unable to fix the speaker issue in a lasting way am I within my rights to take the admittedly major step of rejecting the car for the failure of an expensive option to perform as it should, as the audio is currently unlistenable? I have no gripe with the dealer other than for selling me something I didn’t ask for, I just don’t want a quality issue to be my problem if I fail to act (reasonably) within my 30 day right to reject window.