1. Introduction
The EASYGUARD Smart Key Handsfree PKE Passive Keyless Entry System is designed to upgrade your Mercedes-Benz vehicle with advanced keyless entry and convenience features. This system integrates seamlessly with your car's existing OEM push-start button and comfort access functions, providing automatic locking/unlocking, remote control capabilities, and enhanced security.
This manual provides detailed instructions for installation, operation, maintenance, and troubleshooting to ensure optimal performance and user satisfaction.
2. Key Features
- Passive Keyless Entry (PKE): Automatically locks/unlocks the car when the key fob is within 2-3 meters.
- OEM Integration: Compatible with factory push-start and comfort access functions, including touch-sensitive door handles.
- Enhanced Security: Prevents engine start if the key fob is not detected inside the vehicle.
- Remote Control Functions: Supports remote lock/unlock, trunk release, and power window control (if supported by the original factory key).
- Optional Foot-Activated Trunk: Compatible with foot-kick to open trunk function (if your car has this feature).
- Additional Key Fobs: Includes two new key fobs, with the ability to program up to three.
- Remote Range: Operates effectively within a range of approximately 30-50 meters.
3. Compatibility
This system is designed for selected Mercedes-Benz FBS4 vehicles with factory OEM push-start buttons and comfort access functions. Please verify your car model and year before purchase.
Compatible Car Models (2020-2025):
- A-Class (W177)
- B-Class (W247)
- GLA (H247)
- GLE (W167)
- GLS (X167)
- GLB (X247)
- CLA (C118)
- CLS (C257)
- EQB (2022+)
Important: Please provide your car model number and photos of your factory original key fobs to ensure you receive the correct version of the product.
4. Package Contents
The standard package includes the following components:
- Key Fobs (x2)
- Control Module (x1)
- KG Module Connector (x1)
- PKE Antenna (x2)
- HF Antenna (x1)
- 6-Pin Wire Harness (x1)
5. Installation
Installation of the EASYGUARD Smart Key System requires careful attention to detail. It is highly recommended that installation be performed by a qualified professional.
5.1. Choosing the Right Product Version
There are different versions of the EASYGUARD system. The ESW312-B series requires soldering to your car's original key PCB, while the ESW31203-N-PP series offers a plug-and-play installation without soldering.
Note: If you prefer not to solder with your car key's PCB, please choose the ESW31203-N-PP series.
5.2. Control Module Placement
The control module should be placed securely under the ignition cylinder or the driver's seat. This placement is crucial for the system's high security features, ensuring the car cannot be started if the key is not inside the vehicle.
5.3. Wiring Diagram (Control Module)
The control module has dedicated ports for the HF antenna, power supply, and PKE antenna. Ensure all connections are made correctly according to the diagram.
5.4. 6-Pin Wire Harness Soldering (ESW312-B Series)
For the ESW312-B series, the 6-pin wire harness needs to be soldered to specific points on your car's key PCB. Refer to the diagram for correct wire assignments:
- White wire: Solder with car key unlock wire
- Yellow wire: Solder with car lock wire
- Orange wire: Solder with car trunk wire
- Green wire: Solder with car key panic wire
- Red wire: Solder with car key remote battery +
- Black wire: Solder with car key negative -
5.5. Car Key Antenna Orientation
After wiring and fixing the car key with double-sided tape, ensure the car key antenna side faces upwards as shown in the diagram.
5.6. Antenna Installation Positions
Proper placement of the PKE and High Frequency (HF) antennas is crucial for optimal performance. Refer to the diagram for recommended installation positions:
- P1: High frequency antenna installation position (e.g., front dashboard area)
- P2: High frequency antenna installation position (e.g., rear dashboard area)
- P3: PKE antenna installation (e.g., roof lining)
- P4: PKE antenna installation (e.g., rear parcel shelf)
Note: Choose P1 or P2 as the high frequency antenna placement position.
5.7. KG Module Connector
Different Mercedes-Benz models may require different KG module connectors. We will ship the appropriate connector based on your car model and year. Please ensure you provide accurate vehicle information.
6. Operation
6.1. Passive Keyless Entry (PKE)
- Auto Unlock: The car will automatically unlock when you approach it with the key fob within 1-2 meters.
- Auto Lock: The car will automatically lock when you walk away from it with the key fob, typically within 2-3 meters.
6.2. Enabling/Disabling PKE
To enable or disable the PKE function:
- Hold the Lock and Unlock buttons on the key fob simultaneously for 5 seconds.
- Then, press the Unlock button once to confirm the change.
6.3. Touch Door Handle Function
The system is compatible with factory OEM or aftermarket comfort access functions, allowing you to lock or unlock the car by touching the door handle, similar to the factory function.
To enable this feature:
- Hold the Lock and Trunk Release buttons on the key fob simultaneously for 5 seconds.
- Then, press the Unlock button once to confirm.
Note: If the key fob is inside the car, you cannot use the touch handle to lock or unlock the vehicle for security reasons.
6.4. Remote Control Functions
The new key fobs retain the essential functions of your original factory key. The exact button layout and functions may vary slightly depending on the key fob style (BE2, BE24, BE2W, BE3, BE3S).
- Remote Lock/Unlock: Press the respective buttons on the key fob.
- Trunk Release: Press the trunk release button on the key fob.
- Power Window Up & Down (Optional): This feature is only available if your car's factory key has this functionality.
6.5. High Security Feature
The system is designed with high security in mind. The car will be unable to start if the key fob is not detected inside the vehicle, even if the doors are unlocked.
6.6. Remote Working Range
The remote control has an effective working range of approximately 30-50 meters, allowing you to control your vehicle from a distance.
7. Maintenance
- Key Fob Batteries: Replace key fob batteries as needed to ensure reliable operation. Low battery can affect remote range and PKE functionality.
- Control Module: Ensure the control module is kept dry and free from excessive heat or cold. Avoid exposing it to water or direct sunlight.
- Wiring: Periodically check all wiring connections for any signs of wear or damage. Secure any loose connections.
- Cleaning: Clean the key fobs and external components with a soft, dry cloth. Avoid using harsh chemicals.
8. Troubleshooting
8.1. Remote Control Programming Method
If your remote control is not functioning or you need to program additional key fobs (maximum 3):
- Keep pressing and holding the white programming switch on the control module and do not release it.
- Then, quickly press the "Lock" button once on the remote you plan to program. The indicator light will flash when you press it, indicating successful programming.
- If programming is unsuccessful, check if the remote control has batteries or unplug and re-plug the power connector to the control module and try again.
- After the remote control is programmed, if the PKE antenna is plugged in and the remote control is nearby, the indicator light will be on for a long time. At this time, the vehicle can be started. If the key is left 5 meters away, the light will turn off and the vehicle cannot be started.
8.2. General Troubleshooting Tips
- No Response from Remote/PKE: Check key fob battery. Ensure the control module has power and all connections are secure.
- PKE Not Working Consistently: Verify antenna placement and ensure no metallic objects are obstructing the signal path.
- Car Not Starting: Confirm the key fob is inside the vehicle and the PKE function is enabled (if desired).
9. Specifications
| Feature | Specification |
|---|---|
| Brand Name | EASYGUARD |
| Model Number (Item NO.) | ESW312-B |
| Origin | Mainland China |
| Material | Plastic |
| R/C Function | WITH |
| Customization | No |
| Feature 1 | Upgrade with PKE-Passive keyless entry |
| Feature 2 | Remote lock/unlock |
| Feature 3 | With same car factory key function |
| Feature 4 | Add 2 keys |
| Feature 5 | Unable to start the car if the key is not inside the car |
| Feature 6 | Remote working range around 30-50 meters |
Package Dimensions:
- Length: 17 cm
- Width: 14 cm
- Height: 5 cm
- Weight: 1.0 kg
10. Warranty and Support
EASYGUARD provides a 12-month quality guarantee for this product from the date of purchase. This warranty covers quality-related issues under normal use.
For technical support or any questions regarding installation or operation, please contact our customer support team. Have your EASYGUARD product handy for efficient troubleshooting.
11. Installation & Demonstration Video
Watch this video for a visual guide on the installation process and a demonstration of the system's features.
