1999 Subaru Impreza Owner's Manual - Page 164

D Do not place any foreign objects, especially metal ones such as coins or aluminum foil, into the accessory power socket. That could cause a short circuit. Always put the cap on the accessory power socket when it is not in use. D Use only electrical appliances which are designed for 12V DC and which consume less than 120W. Overloading the accessory power socket can cause a short circuit. Do not use double adapters or more than one electrical appliance. D If the plug on your electric appliance is either too loose or too tight for the accessory power socket, this can result in a poor contact or cause the plug to get stuck. Only use plugs that fit properly in the accessory power socket. D Use of an electric appliance in the accessory power socket for a long period of time while the engine is not running can cause battery discharge. HG6000BA The accessory power socket is located on the right side of the luggage compartment. Electrical power (12V DC) from the battery is on tap at the socket when the ignition switch is either in the "ACC" or "ON" position. You can use an in-car use electrical appliance by connecting it to the socket. 6-8