2008 Mercedes R-Class Owner's Manual - Page 315

Controls in detail Useful features ! The lighter socket can accommodate 12V DC electrical accessories (up to a maximum of 85 W) designed for use with the standard "cigarette lighter" plug type. Keep in mind, however, that connecting accessories to the lighter socket (for example extensive connecting and disconnecting, or using plugs that do not fit properly) can damage the lighter socket. With the socket damaged, the lighter may no longer be able to be placed in the heating (pushed-in) position, or the lighter may pop out too early with the lighter not hot enough. To help avoid damaging the cigarette lighter socket, we recommend connecting 12V DC electrical accessories designed for use with the standard "cigarette lighter" plug type to the 12V power outlets ( page 314) in your vehicle whenever possible. Power outlets Power outlets are located in the front passenger footwell ( page 314) in the second-row footwell ( page 315) on the right-hand side of the cargo compartment ( page 315) Power outlet in front passenger footwell ! If you use all power outlets in the vehicle, make sure that the maximum current drawn does not exceed 55 A. i The power outlets can be used to accommodate 12V DC electrical accessories (e.g. air pump, auxiliary lamps) up to a maximum of 240 W. If the engine is off and the power outlets are being used extensively, the vehicle battery may become discharged. i You can use the power outlets, except for the power outlet in the front center console, even if the ignition is switched off. An emergency shut-off feature ensures that the vehicle's electrical voltage does not fall below a minimum level. If the voltage drops to this minimum level, the power outlets are automatically switched off. This ensures that enough power remains to start the engine. ! The cigarette lighter is not designed for use with the electric air pump ( page 499). Use a power outlet ( page 314) for electric air pump operation. i If the engine is off, and the cigarette lighter is being used extensively, the vehicle battery may become discharged. Switch on the ignition ( page 39). Flip up cover and insert electrical plug (cigarette lighter type). 314