2004 Mercedes SL-Class Owner's Manual - Page 93

Controls in detail Locking and unlocking Restoring to factory setting Press and hold buttons Œ and ‹ simultaneously for about six seconds until battery check lamp 5 ( page 90) flashes twice. Use the mechanical key to lock or unlock the doors ( page 327) . If the SmartKey is malfunctioning, contact an authorized Mercedes-Benz Center. Unlocking the trunk lid You can unlock the trunk separately. A minimum height clearance of 6.2 ft (1.88 m) is required to open the trunk lid. Press and hold button Š until trunk unlocks. Checking the batteries Press button ‹ or Œ. Battery check lamp 5 ( page 90) comes on briefly to indicate that the SmartKey batteries are in order. ! If you can no longer lock or unlock the vehicle with the SmartKey, then the batteries in the SmartKey are discharged, the SmartKey is malfunctioning or the vehicle battery is drained. Check the batteries in the SmartKey ( page 92) and replace them if necessary ( page 328). Use the mechanical key to unlock the doors ( page 325). Have the vehicle batteries and their connections checked ( page 358). ! If battery check lamp 5 does not come on briefly during check, then the SmartKey batteries are discharged. Replace the batteries ( page 328). You can obtain the required batteries at any authorized Mercedes-Benz Center. i If the vehicle was previously centrally locked, the trunk lid will lock automatically when closed. The turn signals will flash three times to confirm locking. i If the batteries are checked within signal range of the vehicle, pressing the ‹ or Œ button will lock or unlock the vehicle accordingly. 92