Problems with the SmartKey
Problem | Possible causes/consequences and
![]() |
You cannot lock or unlock the vehicle using the SmartKey. | The SmartKey battery is discharged or nearly discharged.![]() ![]() ![]() If this does not work: ![]() ![]() |
The SmartKey is faulty.![]() ![]() |
|
You can no longer lock or unlock the vehicle using KEYLESS-GO. | There is interference from a powerful source of radio waves.![]() ![]() ![]() |
There is a malfunction with KEYLESS-GO.![]() ![]() ![]() ![]() If this does not work: ![]() ![]() |
|
You have lost a SmartKey. | ![]() ![]() ![]() |
You have lost the mechanical key. | ![]() ![]() |
The engine cannot be started using the SmartKey. | The on-board voltage is too low.![]() If this does not work: ![]() or ![]() or ![]() |
The engine cannot be started using the SmartKey. | The steering lock is mechanically blocked.![]() |
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.![]() |
There is interference from a powerful source of radio waves.![]() |
See also:
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 ...
Installing the ball coupling
WARNING
If the vehicle/trailer combination is not secured, the trailer may come loose.
As a result, you could cause an accident.
Observe the ball coupling manufacturer's installation inst ...
Warning and display messages in the multifunction display
Activate ATTENTION ASSIST using
the onboard
computer.
Symbol 1 appears in the multifunction
display.
If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after your ...