2006 Mercedes R-Class Owner's Manual - Page 118
2006 Mercedes R-Class Manual
Page 118 highlights
Controls in detail Locking and unlocking If the SmartKey with KEYLESS-GO is positioned farther away from the vehicle, the system may no longer recognize the SmartKey with KEYLESS-GO. The vehicle then cannot be locked or the engine started via the KEYLESS-GO system. If the SmartKey with KEYLESS-GO is removed from the vehicle while starter switch position 1 (e.g. if a passenger exits the vehicle with the SmartKey with KEYLESS-GO), the message Key not detected will appear in the multifunction display while driving off. Find the SmartKey with KEYLESS-GO or change its present location immediately (e.g. place it on the front passenger seat or insert it in shirt pocket). If the SmartKey with KEYLESS-GO is removed from the vehicle with the engine running (e.g. if a passenger exits the vehicle with the SmartKey with KEYLESS-GO), the message Key not detected will appear in the multifunction display while driving off. Find the SmartKey with KEYLESS-GO 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 SmartKey with KEYLESS-GO that is left inside the vehicle. Possibility 1: (One SmartKey with KEYLESS-GO in the vehicle, one SmartKey with KEYLESS-GO outside the vehicle): If you leave the SmartKey with KEYLESS-GO behind when exiting and locking the vehicle, no message appears in the multifunction display. Possibility 2: (One SmartKey with KEYLESS-GO in the vehicle, no SmartKey with KEYLESS-GO outside the vehicle): When exiting and trying to lock the vehicle, the message Key detected in vehicle will appear in the multifunction display. The vehicle will not be locked. 117