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. | KEYLESS-GO is in standby mode because the vehicle has not been
unlocked for an extended period.![]() |
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 the engine does not start after several attempts: ![]() or ![]() or ![]() |
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:
Recovering a vehicle that has become
stuck
Pull away smoothly, slowly, and in a
straight line when pulling out a vehicle that
has become stuck. Excessive tractive
power could damage the vehicles.
If the drive wheels have become stu ...
Operating the on-board computer
The on-board computer is activated as soon
as you turn the SmartKey to position 2 in the
ignition lock.
You can control the multifunction display and
the settings in the on-board computer using ...
Comfort on long journeys as standard: the front seats
The seats in the Mercedes-Benz C-Class make a valuable contribution to
comfort on long journeys. As an optional extra, climatised seats are now
available for the driver and front passenger. They e ...