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 .
■ 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.

1 To unlock X Turn the mechanical key counter-clockwise to position 1.
The door is unlocked.
■ Turn the mechanical key back and remove it.
■ Insert the mechanical key into the SmartKey.
Maintenance
Service interval display
Service messages
Information on the type of service and service
intervals (see separate Service Booklet).
You can obtain further information from an
authorized Mercedes-B ...
Important safety notes
WARNING
Only use fuses that have been approved for
Mercedes-Benz vehicles and that have the
correct fuse rating for the systems
concerned. Do not attempt to repair or bridge
faulty fuses. Using f ...
Steering wheel heating
Activating/deactivating
1 To switch on the steering-wheel heating
2 To switch off the steering-wheel heating
3 Indicator lamp
The steering-wheel heating heats the leather
areas of the steering ...