2011 Mercedes C-Class Owner's Manual - Page 81
2011 Mercedes C-Class Manual
Page 81 highlights
Doors lock yourself out if the vehicle is being pushed, towed, or located on a test rig. X 79 Insert the mechanical key into the lock of the driver's door as far as it will go. X Turn the mechanical key counter-clockwise to position 1. The door is unlocked. X Turn the mechanical key back and remove it. Locking the vehicle (mechanical key) Emergency locking X To deactivate: press and hold button : for about five seconds until a tone sounds. X To activate: press and hold button ; for about five seconds until a tone sounds. i When you push either of the two buttons and an audible warning signal does not sound, the relevant setting has already been selected. On vehicles with a luxury multifunction steering wheel, you can also activate and deactivate the automatic locking using the on-board computer (Y page 181). Unlocking the driver's door (mechanical key) If the vehicle can no longer be unlocked centrally with the SmartKey or KEYLESS-GO: X Take the mechanical key out of the SmartKey (Y page 73). If the vehicle can no longer be locked centrally with the SmartKey or KEYLESS-GO: X Open the driver's door. X Close the front-passenger door, the rear doors and the trunk lid. X Press the locking button (Y page 78). X Make sure that the locking knobs on the doors are still visible. Press down the locking knobs by hand, if necessary. X Close the driver's door. X Take the mechanical key out of the SmartKey (Y page 73). X Insert the mechanical key into the lock of the driver's door as far as it will go. X Turn the mechanical key clockwise as far as it will go to position 1. X Turn the mechanical key back and remove it. X Make sure that the doors and the trunk lid are locked. Z Opening and closing