Right guys...i might go back to jap crap unless this business of issues on a younger german car can be sorted

After the cambelt was sorted, my coolant leak sorted, i now have what i think are probs with the cigarette lighter socket. The socket will heat the lighter thing fine, but will not power any 12v chargers such as mobiles, iPod's, bluetooth headsets. Is this the norm, or is something a miss?? It makes no sense...