Mercedes-Benz E-Class: Problems with the SmartKey
Problem | Possible causes/consequences and Solutions |
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 / button. 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. |
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. •► Pull the door handle and then turn the SmartKey to position 2 in the ignition lock. 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 / button. |
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 / button. •► 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. |
|
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. |
The engine cannot be started using the SmartKey. | The steering lock is mechanically blocked3.
•► Remove the SmartKey and reinsert it into the ignition lock. While doing this, turn the steering wheel in both directions. |
The engine cannot be
started using KEYLESSGO.
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. |
Changing the battery
You require a CR 2025 3 V cell battery. •► Take the mechanical key out of the SmartKey •► Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow ...Doors
...See also:
Refrigerant of the air-conditioning
system
The air-conditioning system is filled with
R134a refrigerant and a special PAG
lubricant.
Never use refrigerant R 12 (CFC) or
mineral lubricants. Otherwise, you could
damage the air-condition ...
Indicator lights
Continuously Variable
Transmission (CVT) indicator light
When the ignition switch is placed in the ON position, the light comes on for
2 seconds.
Continuously Variable
Transmis ...
For best battery service
• Keep the battery securely mounted.
• Keep the battery top clean and dry.
• Keep the terminals and connections clean, tight, and coated with petroleum jelly
or terminal grease.
• Rinse ...