Car features Integrated MP3 adapter

Approximate cost of an integrated MP3 adapter: £75+

Integrated iPod docks can be expensive

Unlike MP3 cassettes and FM transmitters, integrated MP3 adapters let your MP3 player interact with your radio, CD player and hands-free system (if you have one).

That means your MP3 player will charge as you go along, pause when you answer a call, and sound much better because it’s connected directly to your car stereo.

If you have a multi-function steering wheel, you can even skip tracks or change the volume on your MP3 player without touching it.

Often, these integrated MP3 adapters are fitted on new cars as a paid-for option (see our car options guide for more), costing hundreds – if not thousands – of pounds. It is however possible to fit one to an older car for much less.

Car Audio Centre, for example, has iPod adapters for use on dozens of models that cost £77 each. Always check your car’s audio unit is compatible with the features listed before you buy and consider getting expert help if you’re not technically minded.

Your local dealer will be able to offer advice on warranty conditions and how adapting your car changes them.

As the Which? guide to car options explains, integrated MP3 adapters are unlikely to add much value when it comes to selling your car.