2005 Mercedes E-Class Owner's Manual - Page 103

Controls in detail Locking and unlocking ! If you can no longer 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 ( page 101) and replace them if necessary ( page 415). Use the mechanical key to unlock the driver's door ( page 410). Have the vehicle batteries and their connections checked. Use the mechanical key to lock the driver's door ( page 410). If the SmartKey is malfunctioning, contact an authorized Mercedes-Benz Center. Checking the batteries Press button ‹ or Œ. Battery check lamp 5 comes on briefly to indicate that the SmartKey batteries are in order. Unlocking and opening the trunk lid You can unlock and open the trunk separately. A minimum height clearance of 5.90 ft (1.80 m) is required to open the trunk lid. Press and hold button Š until trunk unlocks and begins to open. i If battery check lamp 5 does not come on briefly during check, then the SmartKey batteries are discharged. Replace the batteries ( page 415). You can obtain the required batteries at any authorized Mercedes-Benz Center. ! The trunk lid swings open upwards automatically. Always make sure there is sufficient overhead clearance. Vehicles with trunk lid opening/closing system*: to stop the opening procedure, press button Š on the SmartKey. The trunk lid stops moving. The trunk can also be opened from its inside in an emergency, see "Trunk lid emergency release" ( page 117). i If the batteries are checked within signal range of the vehicle, pressing the button ‹ or Œ will lock or unlock the vehicle accordingly. 101