2003 Mercedes SL-Class Owner's Manual - Page 82

Controls in detail Locking and unlocking ! If you can no longer lock or unlock the vehicle with the key, then either the batteries in the electronics are discharged or the key is malfunctioning. Check the batteries in the key ( page 82) and replace them if necessary ( page 293). or Use the mechanical key to unlock the doors ( page 290) and trunk ( page 291) as required. Lock the vehicle using the mechanical key ( page 292). If the key is malfunctioning, contact an authorized Mercedes-Benz Center. Checking the batteries Press button ‹ or Œ. The battery check lamp 5 lights up briefly to indicate that the key batteries are in order. Unlocking the trunk lid You can unlock the trunk separately. Press and hold button Š until trunk unlocks. 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. ! If the battery check lamp 5 does not light up briefly during check then the key batteries are discharged. Change the batteries ( page 293). You can obtain the required batteries at any authorized Mercedes-Benz Center. 82