2003 Mercedes SL-Class Owner's Manual - Page 85

Controls in detail Locking and unlocking Important notes on using KEYLESS-GO* Always carry the KEYLESS-GO card with you. Never store the KEYLESS-GO card together with: electronic items such as a cellular phone or another KEYLESS-GO card metallic objects such as coins or metal foil Doing so could impair the function of the KEYLESS-GO system. Always take a SmartKey with you in case of a malfunction of the KEYLESS-GO system. To lock or unlock the vehicle, the card must be located outside the vehicle within approximately 3 ft. (1 m) of a door or the trunk lid. In order to start the engine with the KEYLESS-GO card the KEYLESS-GO card must be located in the vehicle all the doors must be closed If you have started the engine with the KEYLESS-GO start/stop button, you can only turn it off again with this button, even if you have put the key in the starter switch in the meantime. This does not apply if, after starting, the selector lever is still in position P. The key will then have priority over the card and the vehicle's electrical system will operate according to the position of the key in the starter switch, even stopping the engine. If the KEYLESS-GO card is positioned farther away from the vehicle (e.g. inside clothing or briefcase) and can no longer be recognized by the system, the vehicle cannot be locked or the engine started via the KEYLESS-GO system. If the KEYLESS-GO card is removed from the vehicle while the ignition is switched on (e.g. if passenger exits the vehicle with the card), the message Chip card not recognized! will appear in the multifunction display. Find the card or change its present location immediately (e.g. place it on the front passenger seat or insert it in shirt pocket). Remember that the engine can be started by anyone with a KEYLESS-GO card that is left inside the vehicle. If you leave the card behind when exiting and locking the vehicle, the message Chip card still in vehicle! will appear in the multifunction display. 85