2011 Mercedes C-Class Owner's Manual - Page 75
2011 Mercedes C-Class Manual
Page 75 highlights
SmartKey i If the vehicle has been parked for a long time, the sensor surfaces are deactivated automatically. Pull the door handle to unlock the door and turn on the ignition once to activate the sensor surfaces again. Changing the settings of the locking system You can change the settings of the locking system in such a way that only the driver's door and the fuel filler flap are unlocked. This is useful if you frequently travel on your own. X To change the setting: press the % and & buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. The SmartKey now functions as follows: X 73 Mechanical key General notes If the vehicle can no longer be locked or unlocked with the SmartKey, use the mechanical key. If you use the mechanical key to unlock and open the driver's door or the trunk lid, the anti-theft alarm system will be triggered (Y page 67). There are several ways to turn off the alarm: X Press the % or & button on the SmartKey. or X Insert the SmartKey into the ignition lock. or X Press the Start/Stop button in the ignition lock. The SmartKey must be in the vehicle. or X Lock or unlock the vehicle using KEYLESSGO. The SmartKey must be outside the vehicle. If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked automatically. X To unlock the fuel filler flap: insert the SmartKey in the ignition lock. To unlock the driver's door: press the % button once. X To unlock centrally: press the % button twice. X To lock centrally: press the & button. The KEYLESS-GO function is changed as follows: X To unlock the driver's door: touch the inner surface of the door handle on the driver's door. X To unlock centrally: touch the inner surface of the door handle on the frontpassenger door or the rear door. X To lock centrally: touch sensor surface : on one of the door handles. Removing the mechanical key Restoring the factory settings X Press the % and & buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. X Push release catch : in the direction of the arrow and at the same time remove mechanical key ; from the SmartKey. Z Opening and closing