2008 Mercedes C-Class Owner's Manual - Page 79

Controls in detail Locking and unlocking The locator lighting will also come on if it is dark and the feature is activated in the control system ( page 172). Global unlocking: Grasp any outside door handle other than the driver's outside door handle. All turn signal lamps flash once. An acoustic signal sounds once. The locking knobs in the doors move up. The anti-theft alarm system is disarmed. The locator lighting will also come on if it is dark and the feature is activated in the control system ( page 172). Global locking: Close all doors and touch outside of a door handle 1 ( page 76). Do not keep your hand in the door handle recess. With the trunk and doors closed: All turn signal lamps flash three times. An acoustic signal sounds three times. The locking knobs in the doors move down. The anti-theft alarm system is armed. Checking batteries in the SmartKey or SmartKey with KEYLESS-GO* (Canada only) Press button ‹ or Œ. The battery check lamp ( page 70) or ( page 73) comes on briefly to indicate that the SmartKey or SmartKey with KEYLESS-GO batteries are in order. i You can also lock the vehicle using the KEYLESS-GO lock button on trunk lid, if equipped ( page 270). ! If the battery check lamp does not come on briefly during check, the SmartKey or SmartKey with KEYLESS-GO batteries are discharged. Replace the batteries ( page 428). You can obtain the required batteries at any authorized Mercedes-Benz Center. Restoring to factory setting: Press and hold buttons Œ and ‹ simultaneously for about 6 seconds until battery check lamp 5 ( page 73) flashes twice. i If the batteries are checked within signal range of the vehicle, pressing button ‹ or Œ will lock or unlock the vehicle accordingly. 78