Buying a new car can be an exciting experience, but when you start scanning down the options list with the salesman breathing down your neck pointing at ever-pricier add-ons, things can soon turn sour.

Should you opt for that dayglo yellow paint scheme and red leather interior or perhaps those massive 20-inch alloys and 1000w sound system is a better bet? How about the entire list of available driver aids that will leave you with nothing more to do than check your email on the way home?

Relying on the salesman may have you driving out of the dealership in the most expensive Mazda 3 in history.

To avoid these pitfalls, we take a look at some of the more popular options out there and see whether they make financial sense as well as assess their level of usefulness. We start off with some of the best options and end with ones you can really do without.

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