How do I change and fix a DC adapter for a 2001 C320 Merc? on 2001 Mercedes-Benz C320

Im fixing my girlfriends DC adapter for her birthday and I don't know how I would do that. We have plugged her ipod and phone charger into it and it does not charge them at all. I would appreciate a step by step of what I would need to do or even what the problem is. Thanks, Audi1997

Autozone have some popular workshop manuals for free on line once you register (for free) on their website There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate