2010 Mercedes S-Class Owner's Manual - Page 279

Locking and unlocking Possibility 2 (One SmartKey in the vehicle, no SmartKey outside the vehicle): When exiting and trying to lock the vehicle, the message Key Detected In Vehicle appears in the multifunction display. The vehicle will not be locked. X 277 Unlocking driver's door and fuel filler flap: Pull the driver's outside door handle. X Global unlocking: Pull any outside door handle other than the driver's outside door handle. X Global locking: Touch outside of a door handle :. Factory setting X RThe RThe vehicle will be locked again. anti-theft alarm system will be rearmed. Example illustration: SmartKey with KEYLESS-GO X X Global locking: Touch outside of a door handle :. Selective setting If you frequently travel alone, you may wish to reprogram the SmartKey. Pulling the driver's outside door handle will then only unlock the driver's door and the fuel filler flap. X Switching on/off: Press and hold buttons % and & simultaneously for approximately 6 seconds until the battery check lamp (Y page 277) flashes twice. KEYLESS-GO will then function as follows: Press button & or % on the SmartKey. Battery check lamp : comes on briefly to indicate that the SmartKey batteries are in order. If the battery check lamp does not come on briefly during check, the SmartKey batteries are discharged. X Replace the batteries (Y page 502). i You can obtain the required batteries at any authorized Mercedes-Benz Center. i If the batteries are checked within signal range of the vehicle, pressing button & or % will lock or unlock the vehicle accordingly. Loss of the SmartKey If you lose your SmartKey or mechanical key, you should do the following: Z Controls in detail Global unlocking: Pull an outside door handle. Unless you open a door or the trunk within approximately 40 seconds after unlocking the vehicle: Checking SmartKey batteries