SmartKey
0 To remove the SmartKey (shift the transmission to position P)
1 Power supply for some consumers, such as the windshield wipers
2 Ignition (power supply for all consumers) and drive position
3 To start the engine
If the SmartKey is in position 0 in the ignition lock for an extended period of time, it can no longer be turned in the ignition lock. The steering is then locked. To unlock, remove the SmartKey and reinsert it into the ignition lock. The steering is locked when you remove the SmartKey from the ignition lock.
The SmartKey can be turned in the ignition lock even if it is not the correct
SmartKey for the vehicle. The ignition is not switched on. The engine cannot be
started.
See also:
Overview
Four years after the market launch of the W221 model series, Mercedes-Benz is
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Important safety notes
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
...
Vehicle
Activating/deactivating the automatic
door locking feature
If you select the Automatic Door Lock:
function, the vehicle is centrally locked above
a speed of around 9 mph (15 km/h).
For fur ...