Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the SmartKey, use the mechanical key.
•► Open the driver's door.
•► Close the front-passenger door, the rear
doors and the trunk lid/tailgate.
•► Press the locking button.
•► Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs by hand, if necessary.
•► Close the driver's door.
•► Take the mechanical key out of the
SmartKey
•► Insert the mechanical key into the lock of
the driver's door as far as it will go.

•► Turn the mechanical key clockwise as far
as it will go to position 1.
•► Turn the mechanical key back and remove
it.
•► Make sure that the doors and the trunk lid/
tailgate are locked.
•► Insert the mechanical key into the
SmartKey.
See also:
Deactivating the HOLD function
The HOLD function is deactivated
automatically if:
- you accelerate and the transmission is in
position D or R.
- you shift the transmission to position P.
- you apply t ...
Switching off the manual drive program
Vehicles with the dynamic
handling
package: press the program selector
button. M is no longer shown
in the multifunction display.
AMG vehicles: turn the drive
program
selector until C, ...
Tire pressure of cold tires
The tires are cold:
• if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
• if the vehicle has not been driven more than
1 mile (1.6 km). ...
