2006 Mercedes SL-Class Owner's Manual - Page 100

Controls in detail Locking and unlocking ! 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 99) and replace them if necessary ( page 389). Use the mechanical key to unlock the driver's door ( page 385) and the trunk ( page 110). Have the vehicle batteries and their connections checked ( page 413). Use the mechanical key to lock or unlock the doors ( page 387). If the SmartKey is malfunctioning, contact an authorized Mercedes-Benz Center. Checking the batteries Press button ‹ or Œ. Battery check lamp 5 ( page 96) comes on briefly to indicate that the SmartKey batteries are in order. Unlocking the trunk 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 on the SmartKey until trunk unlocks. i If battery check lamp 5 does not come on briefly during check, then the SmartKey batteries are discharged. Replace the batteries ( page 389). You can obtain the required batteries at any authorized Mercedes-Benz Center. i If the trunk does not unlock, it is still locked separately ( page 110). i If the batteries are checked within signal range of the vehicle, pressing the ‹ or Œ button will lock or unlock the vehicle accordingly. 99