Mechanical key
General notes
If the vehicle can no longer be unlocked with the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be triggered.
There are several ways to turn off the alarm:
► To turn the alarm off with the
SmartKey: press the 
button
on the SmartKey.
or
► Insert the SmartKey into the ignition
lock.
or
► To deactivate the alarm with KEYLESSGO:
press the Start/Stop button in the
ignition lock. The SmartKey must be in the
vehicle.
or
► Lock or unlock the vehicle using
KEYLESSGO.
The SmartKey must be outside the vehicle.
Removing the mechanical key
► Push release catch 1 in the direction of the arrow and at the same time, remove mechanical key 2 from the SmartKey.
See also:
Information for customers in California
Under California law you may be entitled to a
replacement of your vehicle or a refund of the
purchase price or lease price, if after a
reasonable number of repair attempts
Mercedes-Benz USA, L ...
Activating/deactivating Lane Keeping
Assist
You can use the Lane Keep. Asst. function
to activate/deactivate Lane Keeping Assist or Active Lane Keeping Assist.
•► Press the button on the
steering wheel to select the DriveAssist
me ...
Closing the hood
WARNING
When closing the hood, use extreme caution
not to catch hands or fingers. Be careful that
you do not close the hood on anyone.
Make sure the hood is securely engaged
before driving o ...