Problems with the SmartKey
Problem | Possible causes/consequences and
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You cannot lock or unlock the vehicle using the SmartKey. | The SmartKey battery is discharged or nearly discharged. - Try again to lock/unlock the vehicle using the remote control function of the SmartKey. Point the tip of the SmartKey at the driver's door handle from close range and press the ![]() ![]() If this does not work: - Check the SmartKey battery and replace it if necessary. - Lock or unlock the vehicle using the mechanical key. |
The SmartKey is faulty. - Lock or unlock the vehicle using the mechanical key. - Have the SmartKey checked at a qualified specialist workshop. |
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You can no longer lock or unlock the vehicle using KEYLESS-GO. | There is interference from a powerful source of radio waves. - Lock/unlock the vehicle using the remote control function of the SmartKey. Point the tip of the SmartKey at the driver's door handle from close range and press the ![]() ![]() |
There is a malfunction with KEYLESS-GO. - Lock/unlock the vehicle using the remote control function of the SmartKey. Point the tip of the SmartKey at the driver's door handle from close range and press the ![]() ![]() - Have KEYLESS-GO checked at a qualified specialist workshop. If this does not work: - Check the SmartKey battery and replace it if necessary. - Lock or unlock the vehicle using the mechanical key. |
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You have lost a SmartKey. | - Have the SmartKey deactivated at a qualified specialist
workshop. - Report the loss immediately to the vehicle insurers. - If necessary, have the locks changed as well. |
You have lost the mechanical key. | - Report the loss immediately to the vehicle insurers. - If necessary, have the locks changed as well. |
The engine cannot be started using the SmartKey. | The on-board voltage is too low. - Switch off non-essential consumers, e.g. seat heating or interior lighting, and try to start the engine again. If this does not work: - Check the starter battery and charge it if necessary. or - Jump-start the vehicle. or - Consult a qualified specialist workshop. |
The engine cannot be started using KEYLESS-GO. The SmartKey is in the vehicle. |
A door is open. Therefore, the SmartKey cannot be detected as
easily. - Close the door and try to start the vehicle again. |
There is interference from a powerful source of radio waves. - Start your vehicle with the SmartKey in the ignition lock. |
See also:
Problems with your vehicle
If you should experience a problem with your
vehicle, particularly one that you believe may
affect its safe operation, we urge you to
contact an authorized Mercedes-Benz Center
immediately to ...
Making adjustments in 1 mph (Canada:1 km/h) increments
► Briefly press the cruise control lever
to the
pressure point, up 1 for a higher speed or
down 2 for a lower speed.
The last speed stored is increased or
reduced. ...
Vehicle identification plate with
vehicle identification number (VIN)
and paint code number
– Open the driver's door.
You will see vehicle identification plate 1.
Example: vehicle identification plate (USA only)
2 Paint code
3 VIN
Example: vehicle identification plate (Canad ...