2006 Mercedes R-Class Owner's Manual - Page 114

Controls in detail Locking and unlocking Global locking Press button ‹. With the tailgate and all doors closed, the turn signal lamps flash three times. The locking knobs on the doors move down. The anti-theft alarm system is armed. Restoring to factory setting Press and hold buttons Œ and ‹ simultaneously for about 6 seconds until battery check lamp 5 ( page 110) flashes twice. ! If you cannot lock or unlock the vehicle with the SmartKey, then either the batteries in the SmartKey are discharged, the SmartKey is malfunctioning, or the vehicle battery is drained. Check the batteries in the SmartKey and replace them if necessary ( page 463). Use the mechanical key to unlock the driver's door ( page 459). Lock the vehicle as described in the "Practical hints" section ( page 460). Have the vehicle battery and the vehicle battery connections checked ( page 487). If the SmartKey is malfunctioning, contact an authorized Mercedes-Benz Light Truck Center. Checking the batteries Press button ‹ or Œ. Battery check lamp 5 ( page 110) comes on briefly to indicate that the SmartKey batteries are in order. i If battery check lamp 5 does not come on briefly during check, the SmartKey batteries are discharged. Replace the batteries ( page 463). You can obtain the required batteries at any authorized Mercedes-Benz Light Truck Center. i If the batteries are checked within signal range of the vehicle, pressing the button ‹ or Œ will lock or unlock the vehicle accordingly. 113