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:
Safety guidelines for seat belts,Emergency Tensioning Devices (ETDs)and air bags
WARNING
• Damaged seat belts or seat belts
that have
been subjected to stress in an accident
must be replaced. Their anchoring points
must also be checked. Only use seat belts instal ...
Important safety notes
For reasons of safety, Mercedes-Benz
recommends that you drive with the lights
switched on even during the daytime. In some
countries, operation of the headlamps varies
due to legal requiremen ...
Deactivating/activating ESP® (except
AMG vehicles)
WARNING
ESP® should not be deactivated during
normal driving other than in the
circumstances described below. Disabling
the system will reduce vehicle stability in
driving maneuvers.
Do ...